feat: add stage 0 foundation

infra/backend.Dockerfile

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+FROM python:3.12-slim
+
+ENV PYTHONDONTWRITEBYTECODE=1
+ENV PYTHONUNBUFFERED=1
+
+WORKDIR /app
+
+COPY backend/pyproject.toml /app/pyproject.toml
+RUN pip install --no-cache-dir -e ".[dev]"
+
+COPY backend /app
+
+CMD ["python", "manage.py", "runserver", "0.0.0.0:8000"]

infra/docker-compose.yml

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+services:
+  postgres:
+    image: pgvector/pgvector:pg16
+    environment:
+      POSTGRES_DB: ${POSTGRES_DB:-ai_ticket_platform}
+      POSTGRES_USER: ${POSTGRES_USER:-ai_ticket}
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-ai_ticket}
+    ports:
+      - "5432:5432"
+    volumes:
+      - postgres-data:/var/lib/postgresql/data
+
+  redis:
+    image: redis:7-alpine
+    ports:
+      - "6379:6379"
+
+  minio:
+    image: minio/minio:latest
+    command: server /data --console-address ":9001"
+    environment:
+      MINIO_ROOT_USER: ${MINIO_ROOT_USER:-minio}
+      MINIO_ROOT_PASSWORD: ${MINIO_ROOT_PASSWORD:-minio123}
+    ports:
+      - "9000:9000"
+      - "9001:9001"
+    volumes:
+      - minio-data:/data
+
+  backend:
+    build:
+      context: ..
+      dockerfile: infra/backend.Dockerfile
+    env_file:
+      - path: ../.env
+        required: false
+    ports:
+      - "8000:8000"
+    depends_on:
+      - postgres
+      - redis
+    volumes:
+      - ../backend:/app
+
+  worker:
+    build:
+      context: ..
+      dockerfile: infra/backend.Dockerfile
+    env_file:
+      - path: ../.env
+        required: false
+    command: celery -A config.celery worker -l info
+    depends_on:
+      - backend
+      - redis
+    volumes:
+      - ../backend:/app
+
+  frontend:
+    build:
+      context: ..
+      dockerfile: infra/frontend.Dockerfile
+    ports:
+      - "5173:5173"
+    volumes:
+      - ../frontend:/app
+      - frontend-node-modules:/app/node_modules
+
+volumes:
+  postgres-data:
+  minio-data:
+  frontend-node-modules:

infra/frontend.Dockerfile

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+FROM node:22-slim
+
+WORKDIR /app
+
+COPY frontend/package.json /app/package.json
+RUN npm install
+
+COPY frontend /app
+
+CMD ["npm", "run", "dev", "--", "--host", "0.0.0.0"]