Add a release action

.github/workflows/build-release.yml

@@ -0,0 +1,31 @@
+name: Build Release Assets
+on:
+  release:
+    types: [published]
+    tags:
+      - 'v*'
+
+jobs:
+  build-dist:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out GitHub Repo
+        uses: actions/checkout@v2
+
+      #
+      # Generate bundle
+      #
+      - name: Generate bundle
+        run: |
+             zip bundle.zip *wdl
+
+      #
+      # Add the built assets to the release
+      #
+      - name: Upload specs to release
+        uses: alexellis/[email protected]
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          asset_paths: '["bundle.zip"]'
+