Update Dockerfile

Dockerfile

@@ -1022,7 +1022,8 @@ async def stream_chat_completion(
                             yield line + "\n"
                         elif line.startswith("0:"):
                             # LMArena format: 0:"text"\n
-                            yield f"data: {json.dumps({'choices': [{'delta': {'content': line[2:].strip('"')}}]})}\n\n"
+                            content = line[2:].strip('"')
+                            yield f"data: {json.dumps({'choices': [{'delta': {'content': content}}]})}\n\n"
                         else:
                             yield line + "\n"
                 
@@ -1781,4 +1782,4 @@ PYTHON_EOF
 EXPOSE 7860
 
 # Run the application
-CMD ["python", "/app/app.py"]
+CMD ["python", "/app/app.py"]