refactor/db-docker

.env.example

@@ -16,8 +16,15 @@ PROJECT_VERSION=1.0.0
 
 # Database Configuration
 # For MongoDB (recommended for this project)
+# Option 1: MongoDB Atlas (cloud)
 MONGODB_URI=mongodb+srv://username:password@cluster.mongodb.net/database_name?retryWrites=true&w=majority
 
+# Option 2: Local MongoDB with Docker (development)
+# MONGODB_URI=mongodb://trainee_user:trainee_password@localhost:27017/trainee-schedule?authSource=trainee-schedule
+
+# Option 3: Local MongoDB with admin user
+# MONGODB_URI=mongodb://admin:password123@localhost:27017/trainee-schedule?authSource=admin
+
 # For PostgreSQL (legacy - not used in this project)
 DB_HOST=localhost
 DB_PORT=5432

DOCKER_SETUP.md

+# Docker MongoDB Setup Guide
+
+## Quick Start
+
+### 1. Start MongoDB with Docker
+```bash
+# Start MongoDB only
+docker-compose --profile dev up mongodb -d
+
+# Or start both MongoDB and app
+docker-compose --profile dev up -d
+```
+
+### 2. Update .env file
+Copy `.env.example` to `.env` and update the MongoDB URI:
+
+```bash
+cp .env.example .env
+```
+
+For local Docker MongoDB, use:
+```env
+MONGODB_URI=mongodb://trainee_user:trainee_password@localhost:27017/trainee-schedule?authSource=trainee-schedule
+```
+
+### 3. Start the application
+```bash
+# If not using Docker for the app
+npm install
+npm run dev
+
+# Or using Docker for everything
+docker-compose --profile dev up app-dev -d
+```
+
+## Docker Services
+
+### MongoDB Service
+- **Container Name**: `trainee-schedule-mongodb`
+- **Port**: `27017` (host) -> `27017` (container)
+- **Database**: `trainee-schedule`
+- **Default User**: `trainee_user` / `trainee_password`
+- **Admin User**: `admin` / `password123`
+
+### App Services
+- **Development**: `app-dev` profile
+- **Production**: `app-prod` profile
+
+## Useful Commands
+
+### MongoDB Management
+```bash
+# View MongoDB logs
+docker-compose logs mongodb
+
+# Connect to MongoDB shell
+docker exec -it trainee-schedule-mongodb mongosh
+
+# Connect with admin user
+docker exec -it trainee-schedule-mongodb mongosh -u admin -p password123 --authenticationDatabase admin
+
+# Stop MongoDB
+docker-compose stop mongodb
+
+# Remove MongoDB container and data
+docker-compose down -v
+```
+
+### Application Management
+```bash
+# View app logs
+docker-compose logs app-dev
+
+# Restart app
+docker-compose restart app-dev
+
+# Stop all services
+docker-compose --profile dev down
+```
+
+## Database Initialization
+
+The MongoDB container automatically:
+1. Creates `trainee-schedule` database
+2. Creates `trainee_user` with read/write permissions
+3. Creates collections: `students`, `courses`, `schedules`, `bookings`
+4. Sets up indexes for better performance
+
+## Environment Variables
+
+### MongoDB Connection Options
+
+1. **MongoDB Atlas (Cloud)**:
+   ```env
+   MONGODB_URI=mongodb+srv://username:password@cluster.mongodb.net/trainee-schedule?retryWrites=true&w=majority
+   ```
+
+2. **Local Docker (Recommended for Development)**:
+   ```env
+   MONGODB_URI=mongodb://trainee_user:trainee_password@localhost:27017/trainee-schedule?authSource=trainee-schedule
+   ```
+
+3. **Local Docker with Admin**:
+   ```env
+   MONGODB_URI=mongodb://admin:password123@localhost:27017/trainee-schedule?authSource=admin
+   ```
+
+## Troubleshooting
+
+### Port Already in Use
+```bash
+# Check what's using port 27017
+netstat -tulpn | grep 27017
+
+# Kill the process
+sudo kill -9 <PID>
+```
+
+### Connection Issues
+1. Ensure MongoDB container is running:
+   ```bash
+   docker ps | grep mongodb
+   ```
+
+2. Check container logs:
+   ```bash
+   docker-compose logs mongodb
+   ```
+
+3. Verify .env MONGODB_URI matches container configuration
+
+### Reset Database
+```bash
+# Stop and remove all data
+docker-compose down -v
+
+# Start fresh
+docker-compose --profile dev up mongodb -d
+```
+
+## Development Workflow
+
+1. **Start MongoDB**: `docker-compose --profile dev up mongodb -d`
+2. **Start App**: `npm run dev`
+3. **Test APIs**: Visit `http://localhost:3001/api-docs`
+4. **Stop when done**: `docker-compose --profile dev down`
+
+## Production Deployment
+
+For production, use:
+```bash
+docker-compose --profile prod up -d
+```
+
+This starts both MongoDB and the production app with optimized settings.

docker-compose.yml

 version: "3.8"
 
 services:
+  mongodb:
+    profiles: ["dev", "prod"]
+    image: mongo:7.0
+    container_name: trainee-schedule-mongodb
+    restart: unless-stopped
+    ports:
+      - "27017:27017"
+    environment:
+      - MONGO_INITDB_ROOT_USERNAME=admin
+      - MONGO_INITDB_ROOT_PASSWORD=password123
+      - MONGO_INITDB_DATABASE=trainee-schedule
+    volumes:
+      - mongodb_data:/data/db
+      - ./docker/mongodb/init:/docker-entrypoint-initdb.d
+    healthcheck:
+      test: ["CMD", "mongosh", "--eval", "db.adminCommand('ping')"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+      start_period: 40s
+
   app-dev:
     profiles: ["dev"]
     build:
@@ -48,3 +69,6 @@ services:
       retries: 3
       start_period: 40s
     command: node dist/index.js
+
+volumes:
+  mongodb_data:

docker/mongodb/init/01-init-db.js

+// MongoDB initialization script
+// This script runs when the container first starts
+
+// Switch to the trainee-schedule database
+db = db.getSiblingDB('trainee-schedule');
+
+// Create application user with limited permissions
+db.createUser({
+  user: 'trainee_user',
+  pwd: 'trainee_password',
+  roles: [
+    {
+      role: 'readWrite',
+      db: 'trainee-schedule'
+    }
+  ]
+});
+
+// Create collections and indexes for better performance
+db.createCollection('students');
+db.students.createIndex({ email: 1 }, { unique: true });
+db.students.createIndex({ courseId: 1 });
+db.students.createIndex({ status: 1 });
+
+db.createCollection('courses');
+db.courses.createIndex({ code: 1 }, { unique: true });
+db.courses.createIndex({ status: 1 });
+db.courses.createIndex({ instructor: 1 });
+
+db.createCollection('schedules');
+db.schedules.createIndex({ courseId: 1 });
+db.schedules.createIndex({ date: 1 });
+db.schedules.createIndex({ status: 1 });
+
+db.createCollection('bookings');
+db.bookings.createIndex({ studentId: 1, scheduleId: 1 }, { unique: true });
+db.bookings.createIndex({ status: 1 });
+
+print('Database initialized successfully!');
+print('Created user: trainee_user');
+print('Created collections: students, courses, schedules, bookings');