Docker permissions fix:

- Add user directive to docker-compose.yml using PUID/PGID env vars
- Allows container to run as host user, fixing permission issues with
  bind-mounted volumes (e.g., ./virtual_printer)
- Add chmod 777 to /app/data and /app/logs in Dockerfile for non-root compatibility
- Usage: PUID=$(id -u) PGID=$(id -g) docker compose up -d

Note: Existing named volumes (bambuddy_logs, bambuddy_data) created by previous
root containers may need to be removed or have permissions fixed manually.

Dockerfile

@@ -37,7 +37,8 @@ COPY backend/ ./backend/
 COPY --from=frontend-builder /app/static ./static
 
 # Create data directory for persistent storage
-RUN mkdir -p /app/data /app/logs
+# chmod 777 allows running as non-root user (e.g., with docker compose user: directive)
+RUN mkdir -p /app/data /app/logs && chmod 777 /app/data /app/logs
 
 # Environment variables
 ENV PYTHONUNBUFFERED=1