Initial commit: Plataforma de Economía

Features:
- React 18 + TypeScript frontend with Vite
- Go + Gin backend API
- PostgreSQL database
- JWT authentication with refresh tokens
- User management (admin panel)
- Docker containerization
- Progress tracking system
- 4 economic modules structure

Fixed:
- Login with username or email
- User creation without required email
- Database nullable timestamps
- API response field naming

docker-compose.yml

@@ -0,0 +1,55 @@
+services:
+  postgres:
+    image: postgres:16-alpine
+    container_name: econ-postgres
+    environment:
+      POSTGRES_USER: ${DB_USER:-econ_user}
+      POSTGRES_PASSWORD: ${DB_PASSWORD:-econ_pass}
+      POSTGRES_DB: ${DB_NAME:-econ_db}
+    volumes:
+      - postgres_data:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U ${DB_USER:-econ_user} -d ${DB_NAME:-econ_db}"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+
+  backend:
+    build:
+      context: ./backend
+      dockerfile: Dockerfile
+    container_name: econ-backend
+    environment:
+      DB_HOST: econ-postgres
+      DB_PORT: 5432
+      DB_USER: ${DB_USER:-econ_user}
+      DB_PASSWORD: ${DB_PASSWORD:-econ_pass}
+      DB_NAME: ${DB_NAME:-econ_db}
+      JWT_SECRET: ${JWT_SECRET:-your-secret-key-change-in-production}
+      SERVER_PORT: 8080
+    ports:
+      - "8080:8080"
+    networks:
+      - caddy
+    depends_on:
+      postgres:
+        condition: service_healthy
+
+  frontend:
+    build:
+      context: ./frontend
+      dockerfile: Dockerfile
+    container_name: econ-frontend
+    ports:
+      - "3002:80"
+    networks:
+      - caddy
+    depends_on:
+      - backend
+
+volumes:
+  postgres_data:
+
+networks:
+  caddy:
+    external: true