`gunicorn --bind` instead of `gunicorn -b`
@@ -6,4 +6,4 @@ set -o nounset
python /app/manage.py collectstatic --noinput
-/usr/local/bin/gunicorn config.wsgi -b 0.0.0.0:5000 --chdir=/app
+/usr/local/bin/gunicorn config.wsgi --bind 0.0.0.0:5000 --chdir=/app
