sample backend

backend/.gitignore

@@ -0,0 +1,56 @@
+# compiled output
+/dist
+/node_modules
+/build
+
+# Logs
+logs
+*.log
+npm-debug.log*
+pnpm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+
+# OS
+.DS_Store
+
+# Tests
+/coverage
+/.nyc_output
+
+# IDEs and editors
+/.idea
+.project
+.classpath
+.c9/
+*.launch
+.settings/
+*.sublime-workspace
+
+# IDE - VSCode
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+
+# dotenv environment variable files
+.env
+.env.development.local
+.env.test.local
+.env.production.local
+.env.local
+
+# temp directory
+.temp
+.tmp
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json

backend/.prettierrc

@@ -0,0 +1,4 @@
+{
+  "singleQuote": true,
+  "trailingComma": "all"
+}

backend/README.md

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+<p align="center">
+  <a href="http://nestjs.com/" target="blank"><img src="https://nestjs.com/img/logo-small.svg" width="120" alt="Nest Logo" /></a>
+</p>
+
+[circleci-image]: https://img.shields.io/circleci/build/github/nestjs/nest/master?token=abc123def456
+[circleci-url]: https://circleci.com/gh/nestjs/nest
+
+  <p align="center">A progressive <a href="http://nodejs.org" target="_blank">Node.js</a> framework for building efficient and scalable server-side applications.</p>
+    <p align="center">
+<a href="https://www.npmjs.com/~nestjscore" target="_blank"><img src="https://img.shields.io/npm/v/@nestjs/core.svg" alt="NPM Version" /></a>
+<a href="https://www.npmjs.com/~nestjscore" target="_blank"><img src="https://img.shields.io/npm/l/@nestjs/core.svg" alt="Package License" /></a>
+<a href="https://www.npmjs.com/~nestjscore" target="_blank"><img src="https://img.shields.io/npm/dm/@nestjs/common.svg" alt="NPM Downloads" /></a>
+<a href="https://circleci.com/gh/nestjs/nest" target="_blank"><img src="https://img.shields.io/circleci/build/github/nestjs/nest/master" alt="CircleCI" /></a>
+<a href="https://discord.gg/G7Qnnhy" target="_blank"><img src="https://img.shields.io/badge/discord-online-brightgreen.svg" alt="Discord"/></a>
+<a href="https://opencollective.com/nest#backer" target="_blank"><img src="https://opencollective.com/nest/backers/badge.svg" alt="Backers on Open Collective" /></a>
+<a href="https://opencollective.com/nest#sponsor" target="_blank"><img src="https://opencollective.com/nest/sponsors/badge.svg" alt="Sponsors on Open Collective" /></a>
+  <a href="https://paypal.me/kamilmysliwiec" target="_blank"><img src="https://img.shields.io/badge/Donate-PayPal-ff3f59.svg" alt="Donate us"/></a>
+    <a href="https://opencollective.com/nest#sponsor"  target="_blank"><img src="https://img.shields.io/badge/Support%20us-Open%20Collective-41B883.svg" alt="Support us"></a>
+  <a href="https://twitter.com/nestframework" target="_blank"><img src="https://img.shields.io/twitter/follow/nestframework.svg?style=social&label=Follow" alt="Follow us on Twitter"></a>
+</p>
+  <!--[![Backers on Open Collective](https://opencollective.com/nest/backers/badge.svg)](https://opencollective.com/nest#backer)
+  [![Sponsors on Open Collective](https://opencollective.com/nest/sponsors/badge.svg)](https://opencollective.com/nest#sponsor)-->
+
+## Description
+
+[Nest](https://github.com/nestjs/nest) framework TypeScript starter repository.
+
+## Project setup
+
+```bash
+$ npm install
+```
+
+## Compile and run the project
+
+```bash
+# development
+$ npm run start
+
+# watch mode
+$ npm run start:dev
+
+# production mode
+$ npm run start:prod
+```
+
+## Run tests
+
+```bash
+# unit tests
+$ npm run test
+
+# e2e tests
+$ npm run test:e2e
+
+# test coverage
+$ npm run test:cov
+```
+
+## Deployment
+
+When you're ready to deploy your NestJS application to production, there are some key steps you can take to ensure it runs as efficiently as possible. Check out the [deployment documentation](https://docs.nestjs.com/deployment) for more information.
+
+If you are looking for a cloud-based platform to deploy your NestJS application, check out [Mau](https://mau.nestjs.com), our official platform for deploying NestJS applications on AWS. Mau makes deployment straightforward and fast, requiring just a few simple steps:
+
+```bash
+$ npm install -g @nestjs/mau
+$ mau deploy
+```
+
+With Mau, you can deploy your application in just a few clicks, allowing you to focus on building features rather than managing infrastructure.
+
+## Resources
+
+Check out a few resources that may come in handy when working with NestJS:
+
+- Visit the [NestJS Documentation](https://docs.nestjs.com) to learn more about the framework.
+- For questions and support, please visit our [Discord channel](https://discord.gg/G7Qnnhy).
+- To dive deeper and get more hands-on experience, check out our official video [courses](https://courses.nestjs.com/).
+- Deploy your application to AWS with the help of [NestJS Mau](https://mau.nestjs.com) in just a few clicks.
+- Visualize your application graph and interact with the NestJS application in real-time using [NestJS Devtools](https://devtools.nestjs.com).
+- Need help with your project (part-time to full-time)? Check out our official [enterprise support](https://enterprise.nestjs.com).
+- To stay in the loop and get updates, follow us on [X](https://x.com/nestframework) and [LinkedIn](https://linkedin.com/company/nestjs).
+- Looking for a job, or have a job to offer? Check out our official [Jobs board](https://jobs.nestjs.com).
+
+## Support
+
+Nest is an MIT-licensed open source project. It can grow thanks to the sponsors and support by the amazing backers. If you'd like to join them, please [read more here](https://docs.nestjs.com/support).
+
+## Stay in touch
+
+- Author - [Kamil Myśliwiec](https://twitter.com/kammysliwiec)
+- Website - [https://nestjs.com](https://nestjs.com/)
+- Twitter - [@nestframework](https://twitter.com/nestframework)
+
+## License
+
+Nest is [MIT licensed](https://github.com/nestjs/nest/blob/master/LICENSE).

backend/eslint.config.mjs

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+// @ts-check
+import eslint from '@eslint/js';
+import eslintPluginPrettierRecommended from 'eslint-plugin-prettier/recommended';
+import globals from 'globals';
+import tseslint from 'typescript-eslint';
+
+export default tseslint.config(
+  {
+    ignores: ['eslint.config.mjs'],
+  },
+  eslint.configs.recommended,
+  ...tseslint.configs.recommendedTypeChecked,
+  eslintPluginPrettierRecommended,
+  {
+    languageOptions: {
+      globals: {
+        ...globals.node,
+        ...globals.jest,
+      },
+      sourceType: 'commonjs',
+      parserOptions: {
+        projectService: true,
+        tsconfigRootDir: import.meta.dirname,
+      },
+    },
+  },
+  {
+    rules: {
+      '@typescript-eslint/no-explicit-any': 'off',
+      '@typescript-eslint/no-floating-promises': 'warn',
+      '@typescript-eslint/no-unsafe-argument': 'warn'
+    },
+  },
+);

backend/nest-cli.json

@@ -0,0 +1,8 @@
+{
+  "$schema": "https://json.schemastore.org/nest-cli",
+  "collection": "@nestjs/schematics",
+  "sourceRoot": "src",
+  "compilerOptions": {
+    "deleteOutDir": true
+  }
+}

backend/package.json

@@ -0,0 +1,86 @@
+{
+  "name": "backend",
+  "version": "0.0.1",
+  "description": "",
+  "author": "",
+  "private": true,
+  "license": "UNLICENSED",
+  "scripts": {
+    "build": "nest build",
+    "format": "prettier --write \"src/**/*.ts\" \"test/**/*.ts\"",
+    "start": "nest start",
+    "start:dev": "nest start --watch",
+    "start:debug": "nest start --debug --watch",
+    "start:prod": "node dist/main",
+    "lint": "eslint \"{src,apps,libs,test}/**/*.ts\" --fix",
+    "test": "jest",
+    "test:watch": "jest --watch",
+    "test:cov": "jest --coverage",
+    "test:debug": "node --inspect-brk -r tsconfig-paths/register -r ts-node/register node_modules/.bin/jest --runInBand",
+    "test:e2e": "jest --config ./test/jest-e2e.json"
+  },
+  "dependencies": {
+    "@nestjs/common": "^11.0.1",
+    "@nestjs/config": "^4.0.2",
+    "@nestjs/core": "^11.0.1",
+    "@nestjs/jwt": "^11.0.0",
+    "@nestjs/passport": "^11.0.5",
+    "@nestjs/platform-express": "^11.0.1",
+    "@nestjs/typeorm": "^11.0.0",
+    "bcrypt": "^6.0.0",
+    "dotenv": "^17.2.0",
+    "express": "^5.1.0",
+    "mysql2": "^3.14.1",
+    "passport": "^0.7.0",
+    "passport-jwt": "^4.0.1",
+    "passport-local": "^1.0.0",
+    "reflect-metadata": "^0.2.2",
+    "rxjs": "^7.8.1",
+    "typeorm": "^0.3.25"
+  },
+  "devDependencies": {
+    "@eslint/eslintrc": "^3.2.0",
+    "@eslint/js": "^9.18.0",
+    "@nestjs/cli": "^11.0.0",
+    "@nestjs/schematics": "^11.0.0",
+    "@nestjs/testing": "^11.0.1",
+    "@swc/cli": "^0.6.0",
+    "@swc/core": "^1.10.7",
+    "@types/bcrypt": "^5.0.2",
+    "@types/express": "^5.0.3",
+    "@types/jest": "^29.5.14",
+    "@types/node": "^22.10.7",
+    "@types/supertest": "^6.0.2",
+    "eslint": "^9.18.0",
+    "eslint-config-prettier": "^10.0.1",
+    "eslint-plugin-prettier": "^5.2.2",
+    "globals": "^16.0.0",
+    "jest": "^29.7.0",
+    "prettier": "^3.4.2",
+    "source-map-support": "^0.5.21",
+    "supertest": "^7.0.0",
+    "ts-jest": "^29.2.5",
+    "ts-loader": "^9.5.2",
+    "ts-node": "^10.9.2",
+    "tsconfig-paths": "^4.2.0",
+    "typescript": "^5.7.3",
+    "typescript-eslint": "^8.20.0"
+  },
+  "jest": {
+    "moduleFileExtensions": [
+      "js",
+      "json",
+      "ts"
+    ],
+    "rootDir": "src",
+    "testRegex": ".*\\.spec\\.ts$",
+    "transform": {
+      "^.+\\.(t|j)s$": "ts-jest"
+    },
+    "collectCoverageFrom": [
+      "**/*.(t|j)s"
+    ],
+    "coverageDirectory": "../coverage",
+    "testEnvironment": "node"
+  }
+}

backend/src/app.controller.spec.ts

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+import { Test, TestingModule } from '@nestjs/testing';
+import { AppController } from './app.controller';
+import { AppService } from './app.service';
+
+describe('AppController', () => {
+  let appController: AppController;
+
+  beforeEach(async () => {
+    const app: TestingModule = await Test.createTestingModule({
+      controllers: [AppController],
+      providers: [AppService],
+    }).compile();
+
+    appController = app.get<AppController>(AppController);
+  });
+
+  describe('root', () => {
+    it('should return "Hello World!"', () => {
+      expect(appController.getHello()).toBe('Hello World!');
+    });
+  });
+});

backend/src/app.controller.ts

@@ -0,0 +1,12 @@
+import { Controller, Get } from '@nestjs/common';
+import { AppService } from './app.service';
+
+@Controller()
+export class AppController {
+  constructor(private readonly appService: AppService) {}
+
+  @Get()
+  getHello(): string {
+    return this.appService.getHello();
+  }
+}

backend/src/app.module.ts

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+import { Module } from '@nestjs/common';
+import { AppController } from './app.controller';
+import { AppService } from './app.service';
+import { ConfigModule, ConfigService } from '@nestjs/config';
+import { TypeOrmModule } from '@nestjs/typeorm';
+import { UserModule } from './user/user.module';
+import { RandDataModule } from './rand-data/rand-data.module';
+
+@Module({
+  imports: [
+    ConfigModule.forRoot({ isGlobal: true }),  // .env 불러오도록 설정
+    TypeOrmModule.forRootAsync({
+      imports: [ConfigModule],
+      inject: [ConfigService],
+      useFactory: (config: ConfigService) => ({
+        type: 'mysql',
+        host: config.get<string>('DB_HOST'),
+        port: parseInt(config.get<string>('DB_PORT') || '3306'),
+        username: config.get<string>('DB_USERNAME'),
+        password: config.get<string>('DB_PASSWORD'),
+        database: config.get<string>('DB_DATABASE'),
+        autoLoadEntities: true,
+        synchronize: true,
+      }),
+    }),
+    UserModule,
+    RandDataModule
+  ],
+  controllers: [AppController],
+  providers: [AppService],
+})
+export class AppModule {}

backend/src/app.service.ts

@@ -0,0 +1,8 @@
+import { Injectable } from '@nestjs/common';
+
+@Injectable()
+export class AppService {
+  getHello(): string {
+    return 'Hello World!';
+  }
+}

backend/src/common/api-response.dto.ts

@@ -0,0 +1,11 @@
+export class ApiResponseDto<T = any> {
+    success: boolean;
+    data?: T;
+    message?: string;
+    errorCode?: string | number;
+
+    constructor(success: boolean, option?: Partial<ApiResponseDto<T>>) {
+        this.success = success;
+        if (option) Object.assign(this, option);
+    }
+}

backend/src/main.ts

@@ -0,0 +1,9 @@
+import { NestFactory } from '@nestjs/core';
+import { AppModule } from './app.module';
+
+async function bootstrap() {
+  const app = await NestFactory.create(AppModule);
+  app.enableCors();
+  await app.listen(process.env.PORT ?? 3000);
+}
+bootstrap();

backend/src/rand-data/rand-data-bulk-result.dto.ts

@@ -0,0 +1,9 @@
+export class RandDataBulkResultDto {
+  success: boolean;
+  id: number[];
+
+  constructor(ids: number[]) {
+    this.success = true;
+    this.id = ids;
+  }
+}

backend/src/rand-data/rand-data-list-result.dto.ts

@@ -0,0 +1,9 @@
+export class RandDataListResultDto {
+  success: boolean;
+  data: { id: number; value: number; createdAt: Date }[];
+
+  constructor(data: { id: number; value: number; createdAt: Date }[]) {
+    this.success = true;
+    this.data = data;
+  }
+}

backend/src/rand-data/rand-data-result.dto.ts

@@ -0,0 +1,9 @@
+export class RandDataResultDto {
+  success: boolean;
+  id: number;
+
+  constructor(id: number) {
+    this.success = true;
+    this.id = id;
+  }
+}

backend/src/rand-data/rand-data.controller.spec.ts

@@ -0,0 +1,18 @@
+import { Test, TestingModule } from '@nestjs/testing';
+import { RandDataController } from './rand-data.controller';
+
+describe('RandDataController', () => {
+  let controller: RandDataController;
+
+  beforeEach(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      controllers: [RandDataController],
+    }).compile();
+
+    controller = module.get<RandDataController>(RandDataController);
+  });
+
+  it('should be defined', () => {
+    expect(controller).toBeDefined();
+  });
+});

backend/src/rand-data/rand-data.controller.ts

@@ -0,0 +1,32 @@
+import { Body, Controller, Get, Param, Post } from '@nestjs/common';
+import { RandDataService } from './rand-data.service';
+import { RandDataResultDto } from './rand-data-result.dto';
+import { RandDataBulkResultDto as RandDataBulkResultDto } from './rand-data-bulk-result.dto';
+import { RandDataListResultDto } from './rand-data-list-result.dto';
+
+@Controller('rand-data')
+export class RandDataController {
+    constructor(private randDataService: RandDataService) {}
+
+    @Post('generate')
+    async generate(@Body('userId') userId: number) {
+        const data = await this.randDataService.generateForUser(userId);
+        
+        return new RandDataResultDto(data.id);
+    }
+
+    @Post('populate')
+    async populate(@Body('userId') userId: number, @Body('count') count: number) {
+        const dataList = await this.randDataService.populateForUser(userId, count);
+        const ids = dataList.map(d => d.id);
+
+        return new RandDataBulkResultDto(ids);
+    }
+
+    @Get(':userId')
+    async getAll(@Param('userId') userId: number) {
+        const dataList = await this.randDataService.getAllForUser(userId);
+
+        return new RandDataListResultDto(dataList);
+    }
+}

backend/src/rand-data/rand-data.entity.ts

@@ -0,0 +1,17 @@
+import { User } from "src/user/user.entity";
+import { Column, Entity, ManyToMany, ManyToOne, PrimaryGeneratedColumn } from "typeorm";
+
+@Entity()
+export class RandData {
+    @PrimaryGeneratedColumn()
+    id: number;
+
+    @Column('float')
+    value: number;
+
+    @ManyToOne(() => User, user => user.id)
+    user: User;
+
+    @Column({ default: () => 'CURRENT_TIMESTAMP' })
+    createdAt: Date;
+}

backend/src/rand-data/rand-data.module.ts

@@ -0,0 +1,13 @@
+import { Module } from '@nestjs/common';
+import { RandDataService } from './rand-data.service';
+import { RandDataController } from './rand-data.controller';
+import { TypeOrmModule } from '@nestjs/typeorm';
+import { RandData } from './rand-data.entity';
+import { User } from 'src/user/user.entity';
+
+@Module({
+  imports: [TypeOrmModule.forFeature([RandData, User])],
+  providers: [RandDataService],
+  controllers: [RandDataController]
+})
+export class RandDataModule {}

backend/src/rand-data/rand-data.service.spec.ts

@@ -0,0 +1,18 @@
+import { Test, TestingModule } from '@nestjs/testing';
+import { RandDataService } from './rand-data.service';
+
+describe('RandDataService', () => {
+  let service: RandDataService;
+
+  beforeEach(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      providers: [RandDataService],
+    }).compile();
+
+    service = module.get<RandDataService>(RandDataService);
+  });
+
+  it('should be defined', () => {
+    expect(service).toBeDefined();
+  });
+});

backend/src/rand-data/rand-data.service.ts

@@ -0,0 +1,39 @@
+import { Injectable } from '@nestjs/common';
+import { InjectRepository } from '@nestjs/typeorm';
+import { RandData } from './rand-data.entity';
+import { Repository } from 'typeorm';
+import { User } from 'src/user/user.entity';
+
+@Injectable()
+export class RandDataService {
+    constructor(
+        @InjectRepository(RandData) private randDataRepository: Repository<RandData>,
+        @InjectRepository(User) private userRepository: Repository<User>) {}
+        
+    async generateForUser(userId: number): Promise<RandData> {
+        const user = await this.userRepository.findOne({ where: { id: userId } });
+        if (!user) throw new Error('User not found');
+
+        const value = parseFloat((Math.random() * 100).toFixed(4));
+        const data = this.randDataRepository.create({ value, user });
+        return await this.randDataRepository.save(data);
+    }
+
+    async populateForUser(userId: number, count: number): Promise<RandData[]> {
+        const user = await this.userRepository.findOne({ where: { id: userId } });
+        if (!user) throw new Error('User not found');
+
+        const dataList: RandData[] = [];
+        for (let i = 0; i < count; i++) {
+            const value = parseFloat((Math.random() * 100).toFixed(4));
+            const data = this.randDataRepository.create({ value, user });
+            dataList.push(data);
+        }
+
+        return await this.randDataRepository.save(dataList);
+    }
+
+    async getAllForUser(userId: number): Promise<RandData[]> {
+        return await this.randDataRepository.find({ where: { user: { id: userId } } });
+    }
+}

backend/src/user/user-result.dto.ts

@@ -0,0 +1,9 @@
+export class UserResultDto {
+    success: boolean;
+    id: number;
+
+    constructor(id: number) {
+        this.success = true;
+        this.id = id;
+    }
+}

backend/src/user/user.controller.spec.ts

@@ -0,0 +1,18 @@
+import { Test, TestingModule } from '@nestjs/testing';
+import { UserController } from './user.controller';
+
+describe('UserController', () => {
+  let controller: UserController;
+
+  beforeEach(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      controllers: [UserController],
+    }).compile();
+
+    controller = module.get<UserController>(UserController);
+  });
+
+  it('should be defined', () => {
+    expect(controller).toBeDefined();
+  });
+});

backend/src/user/user.controller.ts

@@ -0,0 +1,31 @@
+import { BadRequestException, Body, Controller, Post } from '@nestjs/common';
+import { UserService } from './user.service';
+import * as bcrypt from 'bcrypt';
+import { UserResultDto } from './user-result.dto';
+
+@Controller('user')
+export class UserController {
+    constructor(private userService: UserService) {}
+
+    @Post('register')
+    async register(@Body('username') username: string, @Body('password') password: string)
+    {
+        const exist = await this.userService.findByUsername(username);
+        if (exist) throw new BadRequestException("Already existed username");
+        
+        const user = await this.userService.create(username, password);
+        return new UserResultDto(user.id);
+    }
+
+    @Post('login')
+    async login(@Body('username') username: string, @Body('password') password: string)
+    {
+        const user = await this.userService.findByUsername(username);
+        if (!user) throw new BadRequestException("Login failed");
+
+        const valid = await bcrypt.compare(password, user.password);
+        if (!valid) throw new BadRequestException("Login failed");
+
+        return new UserResultDto(user.id);
+    }
+}

backend/src/user/user.entity.ts

@@ -0,0 +1,16 @@
+import { Column, Entity, PrimaryGeneratedColumn } from "typeorm";
+
+@Entity()
+export class User {
+    @PrimaryGeneratedColumn()
+    id: number;
+
+    @Column({ unique: true })
+    username: string;
+
+    @Column()
+    password: string;
+
+    @Column({ default: () => 'CURRENT_TIMESTAMP' })
+    createdAt: Date;
+}

backend/src/user/user.module.ts

@@ -0,0 +1,13 @@
+import { Module } from '@nestjs/common';
+import { UserService } from './user.service';
+import { UserController } from './user.controller';
+import { TypeOrmModule } from '@nestjs/typeorm';
+import { User } from './user.entity';
+
+@Module({
+  imports: [TypeOrmModule.forFeature([User])],
+  providers: [UserService],
+  controllers: [UserController],
+  exports: [UserService]
+})
+export class UserModule {}

backend/src/user/user.service.spec.ts

@@ -0,0 +1,18 @@
+import { Test, TestingModule } from '@nestjs/testing';
+import { UserService } from './user.service';
+
+describe('UserService', () => {
+  let service: UserService;
+
+  beforeEach(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      providers: [UserService],
+    }).compile();
+
+    service = module.get<UserService>(UserService);
+  });
+
+  it('should be defined', () => {
+    expect(service).toBeDefined();
+  });
+});

backend/src/user/user.service.ts

@@ -0,0 +1,20 @@
+import { Injectable } from '@nestjs/common';
+import { InjectRepository } from '@nestjs/typeorm';
+import { Repository } from 'typeorm';
+import { User } from './user.entity';
+import * as bcrypt from 'bcrypt';
+
+@Injectable()
+export class UserService {
+    constructor(@InjectRepository(User) private userRepository: Repository<User>) {}
+
+    async create(username: string, password: string): Promise<User> {
+        const hashed = await bcrypt.hash(password, 10);
+        const user = this.userRepository.create({ username, password: hashed });
+        return await this.userRepository.save(user);
+    }
+
+    async findByUsername(username: string): Promise<User | null> {
+        return await this.userRepository.findOne({ where: { username }});
+    }
+}

backend/test/app.e2e-spec.ts

@@ -0,0 +1,25 @@
+import { Test, TestingModule } from '@nestjs/testing';
+import { INestApplication } from '@nestjs/common';
+import * as request from 'supertest';
+import { App } from 'supertest/types';
+import { AppModule } from './../src/app.module';
+
+describe('AppController (e2e)', () => {
+  let app: INestApplication<App>;
+
+  beforeEach(async () => {
+    const moduleFixture: TestingModule = await Test.createTestingModule({
+      imports: [AppModule],
+    }).compile();
+
+    app = moduleFixture.createNestApplication();
+    await app.init();
+  });
+
+  it('/ (GET)', () => {
+    return request(app.getHttpServer())
+      .get('/')
+      .expect(200)
+      .expect('Hello World!');
+  });
+});

backend/test/jest-e2e.json

@@ -0,0 +1,9 @@
+{
+  "moduleFileExtensions": ["js", "json", "ts"],
+  "rootDir": ".",
+  "testEnvironment": "node",
+  "testRegex": ".e2e-spec.ts$",
+  "transform": {
+    "^.+\\.(t|j)s$": "ts-jest"
+  }
+}

backend/tsconfig.build.json

@@ -0,0 +1,4 @@
+{
+  "extends": "./tsconfig.json",
+  "exclude": ["node_modules", "test", "dist", "**/*spec.ts"]
+}

backend/tsconfig.json

@@ -0,0 +1,21 @@
+{
+  "compilerOptions": {
+    "module": "commonjs",
+    "declaration": true,
+    "removeComments": true,
+    "emitDecoratorMetadata": true,
+    "experimentalDecorators": true,
+    "allowSyntheticDefaultImports": true,
+    "target": "ES2023",
+    "sourceMap": true,
+    "outDir": "./dist",
+    "baseUrl": "./",
+    "incremental": true,
+    "skipLibCheck": true,
+    "strictNullChecks": true,
+    "forceConsistentCasingInFileNames": true,
+    "noImplicitAny": false,
+    "strictBindCallApply": false,
+    "noFallthroughCasesInSwitch": false
+  }
+}