update python base image for docker

atdb/Dockerfile

-FROM 3.8-alpine
-ENV PYTHONUNBUFFERED 1
-RUN apk update && apk add bash && apk add nano && apk add mc
+FROM python:3.10-slim
+RUN apt-get update && apt-get install --no-install-recommends -y bash nano mc libmagic1 git
+
 RUN mkdir /src
 WORKDIR /src
 COPY . /src/
 
-# install dependencies
-RUN \
- apk add --no-cache python3 postgresql-libs && \
- apk add --no-cache --virtual .build-deps gcc python3-dev musl-dev postgresql-dev && \
- pip install -r requirements/prod.txt && \
- apk --purge del .build-deps
+RUN pip install --upgrade pip
+RUN pip install -r requirements/prod.txt
+
+RUN python manage.py collectstatic --settings=adex_backend.settings.dev --noinput
 
 # run gunicorn
-CMD exec gunicorn atdb.wsgi_docker_sdc:application --bind 0.0.0.0:8000 --workers 4
+CMD exec gunicorn atdb.wsgi_docker_sdc:application --bind 0.0.0.0:8000 --workers 4 --timeout 120