Init Simple API

Dockerfile

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+# Use official Node.js base image
+FROM node:18-alpine
+
+# Set working directory inside container
+WORKDIR /usr/src/app
+
+# Copy package files and install dependencies
+COPY package*.json ./
+RUN npm install
+
+# Copy app files
+COPY . .
+
+# Expose the port the app runs on
+EXPOSE 3000
+
+# Start the application
+CMD ["npm", "start"]

index.js

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+const express = require('express');
+const app = express();
+const PORT = process.env.PORT || 3000;
+
+app.get('/', (req, res) => {
+  res.json({ message: 'Hello from Node.js API!' });
+});
+
+app.listen(PORT, () => {
+  console.log(`Server is running on port ${PORT}`);
+});

package.json

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+{
+  "name": "simple-api",
+  "version": "1.0.0",
+  "main": "index.js",
+  "scripts": {
+    "start": "node index.js"
+  },
+  "dependencies": {
+    "express": "^4.18.2"
+  }
+}