1st

.dockerignore

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+node_modules
+npm-debug.log

Dockerfile

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+FROM node:20-alpine
+
+WORKDIR /app
+
+COPY package.json ./
+COPY app.js ./
+
+EXPOSE 8080
+
+CMD ["node", "app.js"]

app.js

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+const http = require('http');
+
+const PORT = 8080;
+
+const server = http.createServer((req, res) => {
+  if (req.method === 'GET' && req.url === '/') {
+    res.writeHead(200, { 'Content-Type': 'text/plain' });
+    res.end('7thhh updateee Hello World');
+  } else {
+    res.writeHead(404, { 'Content-Type': 'text/plain' });
+    res.end('Not Found');
+  }
+});
+
+server.listen(PORT, () => {
+  console.log(`Server running on port ${PORT}`);
+});

package.json

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+{
+  "name": "hello-world-app",
+  "version": "1.0.0",
+  "description": "Simple Node.js Hello World app",
+  "main": "app.js",
+  "scripts": {
+    "start": "node app.js"
+  }
+}