Add release package build to GitHub Actions

Fixes #4147

.github/workflows/actions/build/action.yml

@@ -15,15 +15,21 @@ runs:
         # Restore build cache (unless commit SHA changes)
         key: build-${{ runner.os }}-${{ github.sha }}
         path: |
+          dist
           packages/*/dist
           shared/*/dist
 
     - name: Build
       id: build
 
+      env:
+        NODE_ENV: production
+
       # Skip build when we’ve built this SHA before
       if: steps.build-cache.outputs.cache-hit != 'true'
       shell: bash
 
-      # Build all workspaces
-      run: npm run build --workspaces --if-present
+      # Build all workspaces including releases
+      run: |
+        npm run build --workspaces --if-present
+        npm run build:release --workspaces --if-present