Add release workflow (#661)

.github/workflows/release.yml

@@ -0,0 +1,43 @@
+# This workflow will create a GitHub release with a zip attachment
+
+name: Release
+
+on:
+  push:
+    tags:
+    - "*.*.*"
+
+jobs:
+  github-release:
+    runs-on: ubuntu-20.04
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        fetch-depth: 0
+    - uses: ./.github/actions/build
+    - name: Create zip file for release
+      run: |
+        mv dist cocoda
+        zip -r "cocoda-$(git describe --tags).zip" cocoda
+    - name: Set artifact name
+      run: |
+        echo "ARTIFACT_NAME=$(ls cocoda-*.zip)" >> $GITHUB_ENV
+    - name: Create GitHub release
+      id: create_release
+      uses: actions/create-release@v1
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      with:
+        tag_name: ${{ github.ref }}
+        release_name: Cocoda ${{ github.ref }}
+        body: TODO
+        draft: true
+        prerelease: false
+    - uses: actions/upload-release-asset@v1
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      with:
+        upload_url: ${{ steps.create_release.outputs.upload_url }}
+        asset_path: ./${{ env.ARTIFACT_NAME }}
+        asset_name: ${{ env.ARTIFACT_NAME }}
+        asset_content_type: application/zip