fix the path to main.py in app dir

Dockerfile

@@ -16,6 +16,6 @@ RUN pip install --no-cache-dir --upgrade -r requirements.txt
 # Again, ensure the copied files are owned by 'user'
 COPY --chown=user . /app
 # Specify the command to run when the container starts
-CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "7860"]
+CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "7860"]
 # Pass the secret variable to the application
 RUN --mount=type=secret,id=HF_TOKEN,mode=0444,required=true