express server creation

.gitignore

+node_modules/
+package-lock.json

package.json

+{
+  "dependencies": {
+    "express": "^4.21.2"
+  }
+}

server.js

+const express = require("express");
+const app = express();
+const port = 3000;
+
+app.use(express.json());
+
+app.get("/info/:pathParam", (req, res) => {
+    const pathParam = req.params.pathParam; 
+    const queryParam = req.query.q; 
+
+    res.json({
+        message: "GET API Response",
+        pathParam: pathParam,
+        queryParam: queryParam || "No query param provided"
+    });
+});
+
+app.post("/data", (req, res) => {
+    const receivedData = req.body;
+
+    res.json({
+        message: "POST API Response",
+        dataArray: Array.isArray(receivedData) ? receivedData : [receivedData]
+    });
+});
+
+app.listen(port, () => {
+    console.log(`Express Server is running on http://localhost:${port}`);
+});