Update Dockerfile

Dockerfile

@@ -1,13 +1,10 @@
-FROM python:3.12
+FROM python:3.9-slim
 
 WORKDIR /code
 
 COPY ./requirements.txt /code/requirements.txt
+RUN pip install --no-cache-dir -r requirements.txt
 
-RUN pip install --no-cache-dir --upgrade -r /code/requirements.txt
+COPY . /code/
 
-COPY . .
-
-EXPOSE 7860
-
-CMD ["shiny", "run", "app.py", "--host", "0.0.0.0", "--port", "7860"]
+CMD ["python", "app.py"]