Compose-only setup: use python:3.11-slim image, install deps at start, mount code and DB volume; no Dockerfile required

docker-compose.yml

@@ -2,18 +2,28 @@ version: "3.9"
 
 services:
   web:
-    build: .
+    image: python:3.11-slim
     container_name: forme-web
-    ports:
-      - "5000:5000"
+    working_dir: /app
+    command: >-
+      sh -c "pip install --no-cache-dir -r requirements.txt gunicorn &&
+      gunicorn -b 0.0.0.0:5000 app:app --workers 2 --threads 4 --timeout 60"
     environment:
       - SECRET_KEY=${SECRET_KEY:-prod-secret}
       - ADMIN_USERNAME=${ADMIN_USERNAME:-ruslan}
       - ADMIN_PASSWORD=${ADMIN_PASSWORD:-utOgbZ09ruslan}
       - DATABASE=/data/app.db
+      - PYTHONDONTWRITEBYTECODE=1
+      - PYTHONUNBUFFERED=1
     volumes:
+      - .:/app
       - appdb:/data
+      # Persist python packages so we don't reinstall on every restart
+      - pydeps:/usr/local/lib/python3.11/site-packages
+    ports:
+      - "5000:5000"
     restart: unless-stopped
 
 volumes:
   appdb: {}
+  pydeps: {}