feat: add complete Docker setup for testing

- Update docker-compose.yml with frontend service and healthchecks

- Add frontend Dockerfile with dev and production stages

- Add nginx.conf for production frontend serving

- Add docker-compose.prod.yml for production deployment

- Add .env.example with all configuration options

- Add init scripts (init.sh, init.ps1) for easy setup

docker-compose.prod.yml

@@ -0,0 +1,106 @@
+# =============================================================================
+# Aegis - Production Docker Compose
+# =============================================================================
+#
+# Usage:
+#   docker-compose -f docker-compose.prod.yml up -d --build
+#
+# Note: Set environment variables in .env file or via environment
+# =============================================================================
+
+services:
+  # ── PostgreSQL Database ────────────────────────────────────────────────────
+  postgres:
+    image: postgres:15-alpine
+    container_name: aegis-postgres
+    environment:
+      POSTGRES_USER: ${DB_USER:-postgres}
+      POSTGRES_PASSWORD: ${DB_PASSWORD:-postgres}
+      POSTGRES_DB: ${DB_NAME:-attackdb}
+    volumes:
+      - postgres_data:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U ${DB_USER:-postgres} -d ${DB_NAME:-attackdb}"]
+      interval: 5s
+      timeout: 5s
+      retries: 5
+    restart: always
+    networks:
+      - aegis-network
+
+  # ── MinIO Object Storage ───────────────────────────────────────────────────
+  minio:
+    image: minio/minio:latest
+    container_name: aegis-minio
+    command: server /data --console-address ":9001"
+    environment:
+      MINIO_ROOT_USER: ${MINIO_ACCESS_KEY:-minioadmin}
+      MINIO_ROOT_PASSWORD: ${MINIO_SECRET_KEY:-minioadmin}
+    volumes:
+      - minio_data:/data
+    healthcheck:
+      test: ["CMD", "mc", "ready", "local"]
+      interval: 5s
+      timeout: 5s
+      retries: 5
+    restart: always
+    networks:
+      - aegis-network
+
+  # ── FastAPI Backend ────────────────────────────────────────────────────────
+  backend:
+    build:
+      context: ./backend
+      dockerfile: Dockerfile
+    container_name: aegis-backend
+    environment:
+      DATABASE_URL: postgresql://${DB_USER:-postgres}:${DB_PASSWORD:-postgres}@postgres:5432/${DB_NAME:-attackdb}
+      SECRET_KEY: ${SECRET_KEY:?Set SECRET_KEY in environment}
+      ALGORITHM: HS256
+      ACCESS_TOKEN_EXPIRE_MINUTES: ${TOKEN_EXPIRE_MINUTES:-60}
+      MINIO_ENDPOINT: minio:9000
+      MINIO_ACCESS_KEY: ${MINIO_ACCESS_KEY:-minioadmin}
+      MINIO_SECRET_KEY: ${MINIO_SECRET_KEY:-minioadmin}
+      MINIO_BUCKET: ${MINIO_BUCKET:-evidence}
+      MINIO_SECURE: "false"
+    depends_on:
+      postgres:
+        condition: service_healthy
+      minio:
+        condition: service_started
+    command: uvicorn app.main:app --host 0.0.0.0 --port 8000 --workers 4
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:8000/health"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+    restart: always
+    networks:
+      - aegis-network
+
+  # ── React Frontend (Production with Nginx) ─────────────────────────────────
+  frontend:
+    build:
+      context: ./frontend
+      dockerfile: Dockerfile
+      target: production
+    container_name: aegis-frontend
+    ports:
+      - "${FRONTEND_PORT:-80}:80"
+    depends_on:
+      - backend
+    restart: always
+    networks:
+      - aegis-network
+
+# ── Networks ─────────────────────────────────────────────────────────────────
+networks:
+  aegis-network:
+    driver: bridge
+
+# ── Volumes ──────────────────────────────────────────────────────────────────
+volumes:
+  postgres_data:
+    name: aegis_postgres_data_prod
+  minio_data:
+    name: aegis_minio_data_prod