Consolidate location of env vars for prod

Dockerfile

@@ -30,6 +30,5 @@ RUN pip install -U pip && \
     python -m compileall ./mentoring/
 
 EXPOSE 8000
-ENV DJANGO_CONFIGURATION=Production
 
 CMD /app/run-prod.sh

mentoring/wsgi.py

@@ -1,8 +1,3 @@
-import os
-
 from configurations.wsgi import get_wsgi_application
 
-os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'mentoring.settings')
-os.environ.setdefault('DJANGO_CONFIGURATION', 'Production')
-
 application = get_wsgi_application()

run-prod.sh

@@ -1,6 +1,7 @@
 #!/bin/sh -xe
 
 export DJANGO_SETTINGS_MODULE="mentoring.settings"
+export DJANGO_CONFIGURATION="Production"
 
 python manage.py migrate
 gunicorn mentoring.wsgi:application -b 0.0.0.0:"${PORT:-8000}" --log-file -