Add Node.js Hello World application with Docker support

- Added index.js: Simple HTTP server on port 3000
- Added package.json: NPM configuration
- Added Dockerfile: Multi-stage Docker build
- Added .dockerignore: Exclude unnecessary files from build

Ready for Coolify deployment via CI/CD pipeline.

.dockerignore

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+node_modules
+npm-debug.log
+.git
+.gitignore
+README.md

Dockerfile

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+FROM node:18-alpine
+
+WORKDIR /app
+
+COPY package.json .
+
+RUN npm install --production
+
+COPY . .
+
+EXPOSE 3000
+
+CMD ["npm", "start"]

index.js

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+const http = require('http');
+
+const PORT = process.env.PORT || 3000;
+
+const server = http.createServer((req, res) => {
+  res.writeHead(200, { 'Content-Type': 'text/plain' });
+  res.end('Hello World from First Contact! 🚀\n');
+});
+
+server.listen(PORT, '0.0.0.0', () => {
+  console.log(`Server running on port ${PORT}`);
+  console.log(`First Contact application ready!`);
+});

package.json

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+{
+  "name": "firstcontact",
+  "version": "1.0.0",
+  "description": "First Contact - Hello World Application",
+  "main": "index.js",
+  "scripts": {
+    "start": "node index.js",
+    "dev": "node index.js"
+  },
+  "keywords": ["firstcontact", "hello-world"],
+  "author": "mikael.westoo",
+  "license": "MIT",
+  "engines": {
+    "node": ">=18.0.0"
+  }
+}