Adapt Docker file to run first app

Dockerfile

@@ -16,4 +16,4 @@ 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", "app:app", "--host", "0.0.0.0", "--port", "7860"]
+CMD ["uvicorn", "app_hello_world.main:app", "--host", "0.0.0.0", "--port", "7860"]