Make server in web container listen not only on localhost.

docker/entrypoint.dev.sh

@@ -18,7 +18,7 @@ python manage.py collectstatic --no-input --clear
 python manage.py migrate
 python manage.py createsuperuser --no-input
 python manage.py wagtailsiteupdate hypha.test apply.hypha.test 80
-python manage.py runserver 8080
-# gunicorn opentech.wsgi:application --reload --daemon --workers 3 --bind 127.0.0.1:8080 --env DJANGO_SETTINGS_MODULE=opentech.settings.dev
+python manage.py runserver 0.0.0.0:8080
+# gunicorn opentech.wsgi:application --reload --daemon --workers 3 --bind 0.0.0.0::8080 --env DJANGO_SETTINGS_MODULE=opentech.settings.dev
 
 exec "$@"