bootstrap js projects

express-js/.gitignore

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+node_modules/
+build/

express-js/package.json

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+{
+  "name": "money-transfer",
+  "version": "1.0.0",
+  "main": "server.ts",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "build": "tsc",
+    "dev": "node ./build/server.js",
+    "start": "tsc && npm run dev"
+  },
+  "author": "",
+  "license": "ISC",
+  "description": "",
+  "devDependencies": {
+    "@types/cors": "^2.8.19",
+    "@types/express": "^5.0.3",
+    "@types/node": "^24.0.10",
+    "ts-node": "^10.9.2",
+    "typescript": "^5.8.3"
+  },
+  "dependencies": {
+    "cors": "^2.8.5",
+    "express": "^5.1.0"
+  }
+}

express-js/server.ts

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+import express, { Application } from "express";
+import Server from "./src/index";
+
+const app: Application = express();
+const server: Server = new Server(app);
+const PORT: number = process.env.PORT ? parseInt(process.env.PORT, 10) : 8080;
+
+app
+  .listen(PORT, "localhost", function () {
+    console.log(`Server is running on port ${PORT}.`);
+  })
+  .on("error", (err: any) => {
+    if (err.code === "EADDRINUSE") {
+      console.log("Error: address already in use");
+    } else {
+      console.log(err);
+    }
+  });

express-js/src/index.ts

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+import express, { Application } from "express";
+import cors, { CorsOptions } from "cors";
+
+export default class Server {
+  constructor(app: Application) {
+    this.config(app);
+  }
+
+  private config(app: Application): void {
+    const corsOptions: CorsOptions = {
+      origin: "http://localhost:8081"
+    };
+
+    app.use(cors(corsOptions));
+    app.use(express.json());
+    app.use(express.urlencoded({ extended: true }));
+  }
+}

express-js/tsconfig.json

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+{
+  "compilerOptions": {
+    /* Language and Environment */
+    "target": "es2016",                               /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */
+    "experimentalDecorators": true,                   /* Enable experimental support for legacy experimental decorators. */
+    "emitDecoratorMetadata": true,                    /* Emit design-type metadata for decorated declarations in source files. */
+
+    /* Modules */
+    "module": "commonjs",                             /* Specify what module code is generated. */
+    "resolveJsonModule": true,                        /* Enable importing .json files. */
+
+    /* Emit */
+    "outDir": "./build",                              /* Specify an output folder for all emitted files. */
+
+    /* Interop Constraints */
+    "esModuleInterop": true,                          /* Emit additional JavaScript to ease support for importing CommonJS modules. This enables 'allowSyntheticDefaultImports' for type compatibility. */
+    "forceConsistentCasingInFileNames": true,         /* Ensure that casing is correct in imports. */
+
+    /* Type Checking */
+    "strict": true,                                   /* Enable all strict type-checking options. */
+
+    /* Completeness */
+    "skipLibCheck": true                              /* Skip type checking all .d.ts files. */
+  }
+}