Add complete dockerized amigos app with React frontend and MongoDB backend

backend/package.json

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+{
+  "name": "backend",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "type": "commonjs",
+  "dependencies": {
+    "cors": "^2.8.5",
+    "express": "^5.1.0",
+    "mongodb": "^6.19.0"
+  }
+}

backend/server-prod.js

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+const express = require('express');
+const { MongoClient } = require('mongodb');
+const cors = require('cors');
+const path = require('path');
+
+const app = express();
+const PORT = process.env.PORT || 3001;
+
+// Middleware
+app.use(cors());
+app.use(express.json());
+
+// Serve static files from React build
+app.use(express.static(path.join(__dirname, '..', 'dist')));
+
+// MongoDB connection - using host.docker.internal for Docker networking
+const mongoHost = process.env.MONGO_HOST || 'host.docker.internal';
+const uri = `mongodb://admin:MongoPass2024!@${mongoHost}:27017/?authSource=admin`;
+const client = new MongoClient(uri);
+
+let db;
+let amigosCollection;
+
+// Connect to MongoDB
+async function connectDB() {
+  try {
+    await client.connect();
+    console.log('Connected to MongoDB');
+    db = client.db('testdb');
+    amigosCollection = db.collection('amigos');
+  } catch (error) {
+    console.error('Error connecting to MongoDB:', error);
+    // Retry connection after 5 seconds
+    setTimeout(connectDB, 5000);
+  }
+}
+
+// API Routes
+// Get all amigos
+app.get('/api/amigos', async (req, res) => {
+  try {
+    if (!amigosCollection) {
+      return res.status(503).json({ error: 'Database not connected' });
+    }
+    const amigos = await amigosCollection.find({}).toArray();
+    res.json(amigos);
+  } catch (error) {
+    res.status(500).json({ error: error.message });
+  }
+});
+
+// Add new amigo
+app.post('/api/amigos', async (req, res) => {
+  try {
+    if (!amigosCollection) {
+      return res.status(503).json({ error: 'Database not connected' });
+    }
+    
+    const { nombre } = req.body;
+    if (!nombre) {
+      return res.status(400).json({ error: 'Nombre es requerido' });
+    }
+    
+    const result = await amigosCollection.insertOne({ nombre });
+    res.status(201).json({ 
+      message: 'Amigo agregado exitosamente',
+      id: result.insertedId,
+      nombre 
+    });
+  } catch (error) {
+    res.status(500).json({ error: error.message });
+  }
+});
+
+// Health check endpoint
+app.get('/health', (req, res) => {
+  res.json({ 
+    status: 'ok', 
+    mongodb: amigosCollection ? 'connected' : 'disconnected' 
+  });
+});
+
+// Serve React app for all other routes
+app.use((req, res) => {
+  res.sendFile(path.join(__dirname, '..', 'dist', 'index.html'));
+});
+
+// Start server
+connectDB().then(() => {
+  app.listen(PORT, '0.0.0.0', () => {
+    console.log(`Server running on http://0.0.0.0:${PORT}`);
+    console.log(`MongoDB host: ${mongoHost}`);
+  });
+});

backend/server.js

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+const express = require('express');
+const { MongoClient } = require('mongodb');
+const cors = require('cors');
+
+const app = express();
+const PORT = 3001;
+
+// Middleware
+app.use(cors());
+app.use(express.json());
+
+// MongoDB connection
+const uri = 'mongodb://admin:MongoPass2024!@localhost:27017/?authSource=admin';
+const client = new MongoClient(uri);
+
+let db;
+let amigosCollection;
+
+// Connect to MongoDB
+async function connectDB() {
+  try {
+    await client.connect();
+    console.log('Connected to MongoDB');
+    db = client.db('testdb');
+    amigosCollection = db.collection('amigos');
+  } catch (error) {
+    console.error('Error connecting to MongoDB:', error);
+  }
+}
+
+// Routes
+// Get all amigos
+app.get('/api/amigos', async (req, res) => {
+  try {
+    const amigos = await amigosCollection.find({}).toArray();
+    res.json(amigos);
+  } catch (error) {
+    res.status(500).json({ error: error.message });
+  }
+});
+
+// Add new amigo
+app.post('/api/amigos', async (req, res) => {
+  try {
+    const { nombre } = req.body;
+    if (!nombre) {
+      return res.status(400).json({ error: 'Nombre es requerido' });
+    }
+    
+    const result = await amigosCollection.insertOne({ nombre });
+    res.status(201).json({ 
+      message: 'Amigo agregado exitosamente',
+      id: result.insertedId,
+      nombre 
+    });
+  } catch (error) {
+    res.status(500).json({ error: error.message });
+  }
+});
+
+// Start server
+connectDB().then(() => {
+  app.listen(PORT, () => {
+    console.log(`Server running on http://localhost:${PORT}`);
+  });
+});