.- Correct entrypoint.sh

.- Add LOG_LEVEL environment variable
.- Use python 3.6 for compatibility

.dockerignore

 Dockerfile
 .dockerignore
+README.md

Dockerfile

-FROM python:alpine
+FROM python:3.6-alpine
 ARG django_version=1.11
 ARG dev_packages="gcc g++ postgresql-dev"
 ADD ./entrypoint.sh /
@@ -15,6 +15,7 @@ RUN apk update && \
         pip install "Django<=${DJANGO_VERSION}" gunicorn \
           psycopg2-binary psycopg2 mysql-connector \
         django-heroku whitenoise[brotli] && \
-        apk del ${dev_packages}
+        apk del ${dev_packages} && \
+        rm -fr /root/.cache
 
 ENTRYPOINT [ "/entrypoint.sh" ]

entrypoint.sh

@@ -4,6 +4,11 @@ set -x
 git clone ${GIT_URL} .
 pip install -r requirements.txt --no-input
 
+if [ -z "${WSGI_MODULE}" ]
+then
+    export WSGI_MODULE=$(basename $(dirname $(find . -name wsgi.py | head -1))).wsgi
+fi
+
 DJANGO_SETTINGS_MODULE=${DJANGO_SETTINGS_MODULE:-$(basename ${WSGI_MODULE} .wsgi).settings}
 
 # Override static content
@@ -17,10 +22,5 @@ export DJANGO_SETTINGS_MODULE=settings
 python manage.py collectstatic --no-input
 
 python manage.py migrate
-
-if [ -z "${WSGI_MODULE}" ]
-then
-    export WSGI_MODULE=$(basename $(dirname $(find . -name wsgi.py | head -1))).wsgi
-fi
-
-gunicorn --log-level=INFO ${WSGI_MODULE} $*
+LOG_LEVEL=${LOG_LEVEL:-INFO}
+gunicorn --log-level=${LOG_LEVEL} ${WSGI_MODULE} $*