fix(docker): use shell-form CMD to avoid bracket parsing on Space

Dockerfile

@@ -29,4 +29,5 @@ HEALTHCHECK --interval=60s --timeout=10s --start-period=120s --retries=5 \
   CMD curl -f http://localhost:7860/api/health || exit 1
 
 # Start the application
-CMD ["npm", "start"] # rebuild trigger 2025-09-01T14:17:35Z
+# rebuild trigger 2025-09-01T14:18:50Z
+CMD npm start