fix: restore stable custom-shell launcher

app.py

@@ -6,6 +6,7 @@ from pathlib import Path
 from tempfile import NamedTemporaryFile
 
 import gradio as gr
+import uvicorn
 from fastapi import FastAPI, File, UploadFile
 from fastapi.responses import HTMLResponse
 from pydantic import BaseModel
@@ -128,3 +129,7 @@ async def ocr(front: UploadFile | None = File(default=None), back: UploadFile |
 
 
 app = gr.mount_gradio_app(app, build_gradio_engine(), path="/engine")
+
+
+if __name__ == "__main__":
+    uvicorn.run(app, host="0.0.0.0", port=7860)