Fix: Add VITE_API_BASE_URL environment variable to portal frontend CI workflow

Author: rashmithachamikara

.github/workflows/portal-frontend-ci.yml

@@ -14,6 +14,8 @@ on:
 jobs:
   portal-frontend-ci:
     runs-on: ubuntu-latest
+    env:
+      VITE_API_BASE_URL: http://localhost:8080
     defaults:
       run:
         working-directory: portal/frontend