First commit

backend/.env.production

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+PORT=5000
+DB_URI=mongodb://10.1.1.7:27017/
+NODE_ENV=production

backend/.gitignore

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+# Node dependencies
+node_modules
+
+# Logs
+logs
+*.log
+
+# Misc
+.DS_Store
+.fleet
+.idea
+
+# Local env files
+.env
+.env.*
+!.env.production

backend/Dockerfile

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+# Use official Node.js runtime
+FROM node:20-alpine
+
+# Create app directory
+WORKDIR /usr/src/app
+
+# Copy package files first (better caching)
+COPY package*.json ./
+
+# Install dependencies
+RUN npm ci --only=production
+
+# Copy application source
+COPY . .
+
+# Expose the app port
+# EXPOSE 3000
+
+# Environment variable
+ENV NODE_ENV=production
+
+# Start the application
+CMD ["node", "src/index.js"]

backend/package.json

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+{
+  "name": "backend",
+  "version": "1.0.0",
+  "description": "",
+  "license": "ISC",
+  "author": "",
+  "type": "commonjs",
+  "main": "src/index.js",
+  "scripts": {
+    "dev": "nodemon src/index.js"
+  },
+  "dependencies": {
+    "cors": "^2.8.6",
+    "dotenv": "^17.3.1",
+    "express": "^5.2.1",
+    "mongoose": "^9.3.0",
+    "nodemon": "^3.1.14"
+  }
+}

backend/src/db.js

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+const mongoose = require("mongoose");
+
+const connectDB = async () => {
+  try {
+    await mongoose.connect(process.env.DB_URI);
+
+    console.log("MongoDB connected");
+  } catch (error) {
+    console.error("MongoDB connection error:", error);
+    process.exit(1);
+  }
+};
+
+module.exports = connectDB;

backend/src/index.js

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+const express = require("express");
+const cors = require('cors');
+
+const dotenv = require('dotenv');
+
+if(process.env.NODE_ENV) {
+  dotenv.config({
+    path: `.env.${process.env.NODE_ENV}`
+  });
+} else {
+  dotenv.config();
+}
+
+const app = express();
+const connectDB = require("./db");
+
+// connect database
+connectDB();
+
+app.use(cors({
+  origin: 'http://localhost:3000',
+  credentials: true, // if using cookies/auth
+}));
+
+app.get("/api/test", (req, res) => {
+  console.log("Hey");
+  res.json({"message": "Hello from backend!"});
+});
+
+app.listen(5000, () => {
+  console.log("Server running on port 5000");
+});