diff --git a/.gitignore b/.gitignore
index 8c2b884..203d723 100644
--- a/.gitignore
+++ b/.gitignore
@@ -12,3 +12,124 @@
 # Built Visual Studio Code Extensions
 *.vsix
 
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+.pnpm-debug.log*
+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+*.lcov
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# Snowpack dependency directory (https://snowpack.dev/)
+web_modules/
+
+# TypeScript cache
+*.tsbuildinfo
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Microbundle cache
+.rpt2_cache/
+.rts2_cache_cjs/
+.rts2_cache_es/
+.rts2_cache_umd/
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variables file
+.env
+.env.test
+.env.production
+
+# parcel-bundler cache (https://parceljs.org/)
+.cache
+.parcel-cache
+
+# Next.js build output
+.next
+out
+
+# Nuxt.js build / generate output
+.nuxt
+dist
+
+# Gatsby files
+.cache/
+# Comment in the public line in if your project uses Gatsby and not Next.js
+# https://nextjs.org/blog/next-9-1#public-directory-support
+# public
+
+# vuepress build output
+.vuepress/dist
+
+# Serverless directories
+.serverless/
+
+# FuseBox cache
+.fusebox/
+
+# DynamoDB Local files
+.dynamodb/
+
+# TernJS port file
+.tern-port
+
+# Stores VSCode versions used for testing VSCode extensions
+.vscode-test
+
+# yarn v2
+.yarn/cache
+.yarn/unplugged
+.yarn/build-state.yml
+.yarn/install-state.gz
+.pnp.*
+
+#보안관련해서..
+package-lock.json
\ No newline at end of file
diff --git a/letsStart/package.json b/letsStart/package.json
new file mode 100644
index 0000000..9ce32b1
--- /dev/null
+++ b/letsStart/package.json
@@ -0,0 +1,19 @@
+{
+  "scripts": {
+    "build": "tsc",
+    "start:dev": "tsc-watch --onSuccess \"node dist/app.js\"",
+    "prestart": "npm run build",
+    "start": "node dist/app.js"
+  },
+  "devDependencies": {
+    "@types/express": "^5.0.2",
+    "@types/node": "^15.3.0",
+    "prettier": "^2.2.1",
+    "tsc": "^2.0.3",
+    "tsc-watch": "^4.2.9",
+    "typescript": "^4.3.4"
+  },
+  "dependencies": {
+    "express": "^5.1.0"
+  }
+}
diff --git a/letsStart/src/app.ts b/letsStart/src/app.ts
new file mode 100644
index 0000000..bf6242c
--- /dev/null
+++ b/letsStart/src/app.ts
@@ -0,0 +1,13 @@
+import * as express from "express";
+
+const app: express.Express = express();
+const port: number = 8000;
+
+app.get("/", (req: express.Request, res: express.Response) => {
+  console.log(req);
+  res.send("Hello World!");
+});
+
+app.listen(port, () => {
+  console.log(`Example app listening at http://localhost:${port}`);
+});
diff --git a/letsStart/tsconfig.json b/letsStart/tsconfig.json
new file mode 100644
index 0000000..9c7d8ec
--- /dev/null
+++ b/letsStart/tsconfig.json
@@ -0,0 +1,20 @@
+//* https://www.staging-typescript.org/tsconfig
+
+{
+    "compilerOptions": {
+      "strict": true,
+      "module": "commonjs",
+      "declaration": true,
+      "removeComments": true,
+      "emitDecoratorMetadata": true,
+      "experimentalDecorators": true,
+      "allowSyntheticDefaultImports": true,
+      "target": "ES5",
+      "sourceMap": true,
+      "outDir": "./dist",
+      "baseUrl": "./src",
+      "incremental": true
+    },
+    "include": ["src/**/*"]
+  }
+  
\ No newline at end of file