Add gunicorn

docker-compose.yml

@@ -22,7 +22,7 @@ services:
     restart: always
     volumes:
       - .:/lilcity
-    command: bash -c "python manage.py migrate && python manage.py loaddata /lilcity/apps/*/fixtures/*.json && python manage.py runserver 0.0.0.0:8000 && celery worker -A project"
+    command: bash -c "python manage.py migrate && python manage.py loaddata /lilcity/apps/*/fixtures/*.json && gunicorn --workers=4 project.wsgi --bind=0.0.0.0:8000 --worker-class=gthread --reload"
     environment:
       - DJANGO_SETTINGS_MODULE=project.settings
       - DATABASE_SERVICE_HOST=db

requirements.txt

@@ -1,4 +1,5 @@
 # Python-3.6
+gunicorn==19.7.1
 requests==2.18.4
 Django==2.0.2
 django-anymail[mailgun]==1.2