Update Dockerfile

Dockerfile

@@ -52,5 +52,6 @@ EXPOSE 8000
 HEALTHCHECK --interval=30s --timeout=10s --retries=3 \
   CMD curl -fsS "http://127.0.0.1:${PORT}/health" || exit 1
 
-# Use $PORT when present (Render sets it), default to 8000 locally
-CMD ["sh","-c","uvicorn backend:app --host 0.0.0.0 --port ${PORT:-8000}"]
+# Use $PORT when present (Render sets it), default to 8000 locally - application started
+CMD ["sh","-c","uvicorn backend:app --host 0.0.0.0 --port ${PORT:-8000
+