Adding files.

docker-compose.yml

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+version: '3.8'
+
+services:
+  bookapp:
+    build: .
+    container_name: bookapp
+    restart: unless-stopped
+    ports:
+      - "5000:5000"
+    working_dir: /app
+    volumes:
+      # --- PERSISTENCE (Data & Login) ---
+      # These mounts ensure your projects and login tokens survive container resets
+      # HOST_PATH is defined in Portainer Environment Variables (e.g. /opt/bookapp)
+      - ${HOST_PATH:-.}/data:/app/data
+      - ${HOST_PATH:-.}/token.json:/app/token.json
+      - ${HOST_PATH:-.}/credentials.json:/app/credentials.json
+      # --- DEVELOPMENT (Code Sync) ---
+      # UNCOMMENT these lines only if you are developing and want to see changes instantly.
+      # For production/deployment, keep them commented out so the container uses the built image code.
+      # - ./modules:/app/modules
+      # - ./templates:/app/templates
+      # - ./main.py:/app/main.py
+      # - ./wizard.py:/app/wizard.py
+      # - ./config.py:/app/config.py
+    environment:
+      - PYTHONUNBUFFERED=1
+      - GOOGLE_APPLICATION_CREDENTIALS=/app/credentials.json
+      - PYTHONPATH=/app
+      - FLASK_SECRET_KEY=change_this_to_a_random_string
+      - ADMIN_USERNAME=admin
+      - ADMIN_PASSWORD=change_me_in_portainer
+      - GEMINI_API_KEY=${GEMINI_API_KEY}