perf: multi-stage Dockerfile, remove workers, fix docker-compose prod

backend/.dockerignore

 __pycache__
 *.pyc
+*.pyo
 .env
+.env.*
 .venv
 venv
 .git
@@ -8,3 +10,11 @@ venv
 .dockerignore
 logs
 data
+*.md
+*.txt
+!requirements.txt
+tests/
+.agent/
+.agents/
+dashboard_debug.png
+dashboard_fixed.png

backend/Dockerfile.prod

+# ── Stage 1: Builder ──
+FROM python:3.11-slim AS builder
 
-FROM python:3.11-slim
+WORKDIR /build
 
+COPY requirements.txt .
+RUN pip install --no-cache-dir --prefix=/install -r requirements.txt
 
-WORKDIR /app
+# ── Stage 2: Runtime (minimal) ──
+FROM python:3.11-slim
 
+WORKDIR /app
 
 ENV PYTHONUNBUFFERED=1
 ENV PYTHONDONTWRITEBYTECODE=1
-ENV ENV=development
+ENV ENV=production
 
-COPY requirements.txt .
-RUN pip install -r requirements.txt
+# Copy only installed packages from builder
+COPY --from=builder /install /usr/local
 
 COPY . .
 
-EXPOSE 5000
-
-ENV WORKERS=16
-ENV TIMEOUT=60
+EXPOSE 5005
 
-CMD gunicorn server:app --workers $WORKERS --worker-class uvicorn.workers.UvicornWorker --bind 0.0.0.0:5000 --timeout $TIMEOUT
+CMD ["uvicorn", "server:app", "--host", "0.0.0.0", "--port", "5005", "--timeout-keep-alive", "65"]

backend/docker-compose.prod.yml

@@ -8,20 +8,20 @@ services:
     env_file: .env
     ports:
       - "5005:5005"
-    volumes:
-      - .:/app
     environment:
-      - PORT=5005
+      - ENV=production
     restart: unless-stopped
     deploy:
       resources:
         limits:
-          memory: 8g
+          memory: 4g
     networks:
       - backend_network
     logging:
       driver: "json-file"
       options:
+        max-size: "50m"
+        max-file: "3"
         tag: "{{.Name}}"
 
 networks: