Multi-stage backend Dockerfile (development/production), DB_* env vars, dev target pinning

.env.example

@@ -21,6 +21,9 @@ DATABASE_URL=sqlite+aiosqlite:///./data/app.db
 
 # Production: PostgreSQL (uncomment and configure)
 # DATABASE_URL=postgresql+asyncpg://updater:secure-password@db:5432/insight_updater
+DB_NAME=insight_updater
+DB_USER=updater
+DB_PASSWORD=change-me-db-password
 
 # =============================================================================
 # REDIS (for Socket.io pub/sub, caching, rate limiting)

backend/Dockerfile

@@ -1,4 +1,4 @@
-FROM python:3.11-slim
+FROM python:3.11-slim AS base
 
 WORKDIR /app
 
@@ -25,8 +25,15 @@ COPY . .
 
 # Create non-root user
 RUN useradd -m -u 1000 appuser && chown -R appuser:appuser /app
-USER appuser
 
 EXPOSE 8000
 
-CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000", "--reload"]
+# Development stage: hot reload
+FROM base AS development
+USER appuser
+CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000", "--reload"]
+
+# Production stage: no reload
+FROM base AS production
+USER appuser
+CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000"]

docker-compose.yml

@@ -8,6 +8,7 @@ services:
     build:
       context: ./backend
       dockerfile: Dockerfile
+      target: development
     container_name: insight-updater-backend
     environment:
       - APP_ENV=development