Use ubuntu instead of alpine

Dockerfile

-FROM python:3.6-alpine
+FROM python:3.6
 ARG django_version=1.11
-ARG dev_packages="gcc g++ postgresql-dev"
+ARG dev_packages="gcc g++ libpq-dev"
 ADD ./entrypoint.sh /
 
 VOLUME /static
+VOLUME /media
 
 WORKDIR /app
 
-RUN apk update && \
-        apk add bash git \
-        ${dev_packages} && \
-        DJANGO_VERSION=$(echo ${django_version} | \
+RUN apt-get update &&  \
+        apt-get install -y glusterfs-client git ${dev_packages} && \
+         DJANGO_VERSION=$(echo ${django_version} | \
         awk -F. '{bump=$NF+1;for(i=1;i<NF;i++){printf("%s.",$i)};printf("%s",bump)}') && \
-        pip install "Django<=${DJANGO_VERSION}" gunicorn \
-          psycopg2-binary psycopg2 mysql-connector \
+         pip install "Django<=${DJANGO_VERSION}" gunicorn \
+           psycopg2-binary psycopg2 mysql-connector \
         django-heroku whitenoise[brotli] && \
-        apk del ${dev_packages} && \
+        apt-get purge -y ${dev_packages} && \
+        apt-get autoremove -y && \
         rm -fr /root/.cache
 
+# RUN apk update && \
+#         apk add bash git \
+#         ${dev_packages} && \
+#         DJANGO_VERSION=$(echo ${django_version} | \
+#         awk -F. '{bump=$NF+1;for(i=1;i<NF;i++){printf("%s.",$i)};printf("%s",bump)}') && \
+#         pip install "Django<=${DJANGO_VERSION}" gunicorn \
+#           psycopg2-binary psycopg2 mysql-connector \
+#         django-heroku whitenoise[brotli] && \
+#         apk del ${dev_packages} && \
+#         rm -fr /root/.cache
+
 ENTRYPOINT [ "/entrypoint.sh" ]