update port to 7860

Dockerfile

@@ -24,4 +24,4 @@ COPY ./app ./app
 EXPOSE 8000
 
 # 启动命令
-CMD ["python", "-m", "uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000"]
+CMD ["python", "-m", "uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "7860"]