doc: add instruction for using GitHub Actions (#4071)

Co-authored-by: Sherlock Xu <65327072+Sherlock113@users.noreply.github.com>
Co-authored-by: Aaron Pham <29749331+aarnphm@users.noreply.github.com>

docs/source/data/workflow.yaml

@@ -0,0 +1,23 @@
+name: Update Bento Deployment
+on:
+push:
+  tags:
+    - v*
+
+jobs:
+  build_and_deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - uses: actions/setup-python@v4
+        with:
+        python-version: '3.10'
+        cache: 'pip'
+
+      - name: Build and Deploy
+        uses: bentoml/deploy-bento-action@main
+        with:
+          cloud_api_token: ${{ secrets.CLOUD_API_TOKEN }}
+          cloud_endpoint: ${{ secrets.CLOUD_ENDPOINT }}
+          deployment_name: test-iris

docs/source/tutorial.rst

@@ -650,6 +650,22 @@ specific for ML, the BentoML team has also created Yatai and bentoctl:
 Learn more about different deployment options with BentoML from the
 :doc:`concepts/deploy` page.
 
+Using GitHub Actions to Boost Your Workflow
+-------------------------------------------
+
+BentoML provides a GitHub Action to help you automate the process of building Bentos and deploying them to the cloud.
+To create a GitHub Actions workflow, you need to first define a workflow file as below:
+
+.. literalinclude:: ./data/workflow.yaml
+   :language: yaml
+
+The action [`bentoml/deploy-bento-action`](https://github.com/bentoml/deploy-bento-action) requires `cloud_api_token` and `cloud_endpoint`, which you can set the [repository secrets](https://docs.github.com/en/actions/security-guides/encrypted-secrets#creating-encrypted-secrets-for-a-repository) to make sure the job has correct privilege.
+
+You can get more details about this file in :ref:`Deploying Your Bento <bentocloud/how-tos/deploy-bentos:Deploying Your Bento>` and `the GitHub Actions documentation <https://docs.github.com/en/actions/quickstart>`_.
+
+With this workflow, every time you push changes to the repository, a new Bento will be built and rolled out to the existing deployment.
+
+Read the usage and available input parameters of this action in the `Action README <https://github.com/bentoml/deploy-bento-action>`_.
 
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