Fix app for frontend

app.py

@@ -2,6 +2,7 @@ from fastapi import FastAPI, Request
 from fastapi.responses import HTMLResponse, StreamingResponse
 from fastapi.templating import Jinja2Templates
 from pmbl import PMBL
+import os
 
 app = FastAPI()
 pmbl = PMBL("./PMB-7b.Q6_K.gguf")  # Replace with the path to your model
@@ -39,4 +40,4 @@ if __name__ == "__main__":
     import asyncio
 
     loop = asyncio.get_event_loop()
-    loop.run_until_complete(uvicorn.run(app, host="0.0.0.0", port=1771))
+    loop.run_until_complete(uvicorn.run(app, host="0.0.0.0", port=int(os.environ.get("PORT", 8000))))