Changing from uvicorn to gunicorn

Dockerfile

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

requirements.txt

@@ -8,6 +8,7 @@ dash-html-components==2.0.0
 dash-table==5.0.0
 duckdb==0.9.2
 Flask==3.0.2
+gunicorn==21.2.0
 h11==0.14.0
 idna==3.6
 importlib-metadata==7.0.1