Create Basic Express Server

Express.js

Node.js

Technical Specification

Set up a basic Express server with a single GET / route that returns a JSON welcome message.

Input/Output Samples

Input:GET /

Output:{ "message": "Welcome to Express API" }

Optimal Logic Path

const express = require("express");
const app = express();
const PORT = process.env.PORT || 3000;

app.get("/", (req, res) => {
  res.json({ message: "Welcome to Express API" });
});

app.listen(PORT, () => {
  console.log("Server listening on port", PORT);
});

Architectural Deep-Dive

We create an Express app, define a route handler for GET /, and listen on a given port.