Update main.py file

main.py

@@ -43,4 +43,8 @@ async def health_check():
 
 @app.get("/")
 async def root():
-    return {"message": "Hello World"}
+    return {"message": "Hello World"}
+
+if __name__ == "__main__":
+    import uvicorn
+    uvicorn.run(app, host="0.0.0.0", port=8000)