Merge pull request #525 from artoonie/update-serve

update serve.sh to use double brackets

Author: artoonie

scripts/serve.sh

@@ -12,7 +12,7 @@ source venv/bin/activate
 admin_exists=$(python manage.py shell -c "from django.contrib.auth import get_user_model; User = get_user_model(); print(User.objects.filter(email='$OFFLINE_ADMIN', is_superuser=True).exists())")
 
 # Prompt the user to create the admin if not
-if [ "$admin_exists" = "False" && "$OFFLINE_MODE" = "True" ]; then
+if [[ "$admin_exists" = "False" && "$OFFLINE_MODE" = "True" ]]; then
     echo "Admin user with email $OFFLINE_ADMIN does not exist. Please create one."
     python manage.py createsuperuser --email $OFFLINE_ADMIN
 else
@@ -22,4 +22,4 @@ fi
 # Clear cache, compress and run the server
 python3 manage.py clearCache
 python3 manage.py compress
-python3 manage.py runserver
+python3 manage.py runserver