Update Uvicorn server port from 8000 to 7860

- Modify default server port in app.py
- Adjust host binding to maintain existing configuration
- Ensure compatibility with deployment environment

app.py

@@ -111,4 +111,4 @@ async def api_home():
 
 if __name__ == "__main__":
     import uvicorn
-    uvicorn.run(app, host="0.0.0.0", port=8000)
+    uvicorn.run(app, host="0.0.0.0", port=7860)