post review fixes

packages/backend/src/apps/gitlab/common/get-base-url.ts

@@ -0,0 +1,15 @@
+import { IGlobalVariable } from '@automatisch/types';
+
+const getBaseUrl = ($: IGlobalVariable): string => {
+  if ($.auth.data.instanceUrl) {
+    return $.auth.data.instanceUrl as string;
+  }
+
+  if ($.app.apiBaseUrl) {
+    return $.app.apiBaseUrl;
+  }
+
+  return $.app.baseUrl;
+};
+
+export default getBaseUrl;