Add build action for archiving artifacts on merge

.github/workflows/build.yml

@@ -0,0 +1,32 @@
+name: Build
+on:
+  push:
+    branches:
+      - mdl-1.x
+
+jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: npm install build and test
+        uses: actions/setup-node@v4
+        with:
+          node-version: 11
+          cache: 'npm'
+        run: |
+          npm install
+          npm run test
+      - name: Archive production artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: dist
+          path: |
+            dist/material.js
+            dist/material.min.js
+            dist/material.min.js.map

.github/workflows/ci.yml

@@ -2,9 +2,6 @@ name: CI
 on:
   pull_request:
   merge_group:
-  push:
-    branches:
-      - mdl-1.x
 
 jobs:
   tests: