Verify the admin web app builds

web/.github/workflows/build-next.yml

@@ -0,0 +1,18 @@
+name: Build admin app
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches: master
+
+jobs:
+  run:
+    name: npm run build
+    runs-on: ubuntu-latest
+    steps:
+        - name: Checkout repo
+          uses: actions/checkout@v2
+
+        - name: Install dependencies
+          run: npm install && npm run build