Update Dockerfile

Dockerfile

@@ -1,5 +1,5 @@
 # Use an official Python runtime as a parent image
-FROM python:3.8-slim
+FROM python:3.9
 
 # Set the working directory
 WORKDIR /app
@@ -13,8 +13,5 @@ RUN pip install --no-cache-dir -r requirements.txt
 # Make port 8000 available to the world outside this container
 EXPOSE 8000
 
-# Define environment variable
-ENV NAME FlaskApp
-
 # Run app.py when the container launches
-CMD ["gunicorn", "-b", "0.0.0.0:8000", "app:app"]
+CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "8000"]