Move backend migration to abra.sh command

abra.sh

@@ -1,3 +1,11 @@
 # Set any config versions here
 # Docs: https://docs.coopcloud.tech/maintainers/handbook/#manage-configs
 export NGINX_CONF_VERSION=v2
+
+# environment() {
+#   # TODO: Add file_env here
+# }
+
+migrate() {
+  python manage.py migrate --noinput
+}