Checkpoint React frontend migration

docker-compose.yml

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+version: '3.8'
+
+services:
+  # 1. FastAPI Backend
+  backend:
+    build:   
+      context: ./backend
+    ports:
+      - "8000:8000"
+    env_file:
+      - ./backend/.env
+    environment:
+      - DATABASE_URL=postgresql+asyncpg://irt_user:dev_password@postgres:5432/irt_bank_soal
+      - REDIS_URL=redis://redis:6379/0
+    depends_on:
+      - postgres
+      - redis
+    restart: unless-stopped
+
+  # 2. Redis Message Broker (Required by Celery)
+  redis:
+    image: redis:7-alpine
+    ports:
+      - "6380:6379"
+    restart: unless-stopped
+    volumes:
+      - redis_data:/data
+
+  # 2.5 PostgreSQL Database
+  postgres:
+    image: postgres:15-alpine
+    environment:
+      POSTGRES_USER: irt_user
+      POSTGRES_PASSWORD: dev_password
+      POSTGRES_DB: irt_bank_soal
+    ports:
+      - "5433:5432"
+    volumes:
+      - postgres_data:/var/lib/postgresql/data
+    restart: unless-stopped
+
+  # 3. Celery Worker (For AI Generation Background Tasks)
+  celery_worker:
+    build:   
+      context: ./backend
+    command: ["celery", "-A", "app.core.celery_app", "worker", "--loglevel=info"]
+    env_file:
+      - ./backend/.env
+    environment:
+      - DATABASE_URL=postgresql+asyncpg://irt_user:dev_password@postgres:5432/irt_bank_soal
+      - REDIS_URL=redis://redis:6379/0
+    depends_on:
+      - backend
+      - redis
+    restart: unless-stopped
+
+  # 4. React Frontend SPA
+  frontend:
+    build:
+      context: ./frontend
+      args:
+        VITE_API_URL: "http://localhost:8000/api/v1"
+    ports:
+      - "3000:80"
+    depends_on:
+      - backend
+    restart: unless-stopped
+
+volumes:
+  postgres_data:
+  redis_data: