docs: add publish step (#14304)

.github/workflows/superset-docs.yml

@@ -9,14 +9,15 @@ on:
       - "docs/**"
 
 jobs:
-  docs:
-    name: docs
+  build-deploy:
+    name: Build & Deploy
     runs-on: ubuntu-20.04
     steps:
       - name: "Checkout ${{ github.ref }} ( ${{ github.sha }} )"
         uses: actions/checkout@v2
         with:
           persist-credentials: false
+          submodules: recursive
       - name: npm install
         working-directory: ./docs
         run: |
@@ -29,3 +30,15 @@ jobs:
         working-directory: ./docs
         run: |
           npm run build
+      - name: deploy docs
+        if: github.ref == 'refs/heads/master'
+        uses: ./.github/actions/github-action-push-to-another-repository
+        env:
+          API_TOKEN_GITHUB: ${{ secrets.SUPERSET_SITE_BUILD }}
+        with:
+          source-directory: './docs/public'
+          destination-github-username: 'apache'
+          destination-repository-name: 'superset-site'
+          target-branch: 'asf-site'
+          commit-message: "deploying docs: ${{ github.event.head_commit.message }} (apache/superset@${{ github.sha }})"
+          user-email: dev@superset.apache.org