CI: add steps for single-executable release

.github/workflows/release.yml

@@ -28,13 +28,21 @@ jobs:
         env:
           NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
 
+      - run: npm run build-pkg
+      - run: git fetch origin ${{ github.ref }}
+      - run: git for-each-ref ${{ github.ref }} --format="%(contents)" > body
+
       - name: Create Release
-        uses: actions/create-release@v1
+        uses: softprops/action-gh-release@v1
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         with:
-          tag_name: ${{ github.ref }}
-          release_name: Release ${{ github.ref }}
+          name: Release ${{ github.ref }}
+          body_path: body
+          files: |
+            dist-pkg/flood-linux
+            dist-pkg/flood-macos
+            dist-pkg/flood-win.exe
 
   release-docker:
     runs-on: ubuntu-latest