added gunicorn

Dockerfile

@@ -8,4 +8,4 @@ RUN pip install --no-cache-dir --upgrade -r /code/requirements.txt
 
 COPY . .
 
-CMD ["gunicorn", "app.main:app", "--host", "0.0.0.0", "--port", "7860"]
+CMD ["gunicorn", "-c", "gunicorn_config.py", "app:app"]

requirements.txt

@@ -3,6 +3,7 @@ certifi==2023.7.22
 charset-normalizer==3.2.0
 click==8.1.7
 Flask==2.3.3
+gunicorn==21.2.0
 idna==3.4
 itsdangerous==2.1.2
 Jinja2==3.1.2