use kamal to deploy in github actions

Author: flyerhzm

.github/workflows/main.yml

@@ -0,0 +1,31 @@
+name: docker build and publish
+on:
+  push:
+    branches:
+      - main
+jobs:
+  build-and-publish:
+    name: build and publish
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout Code
+        uses: actions/checkout@v2
+
+      - uses: webfactory/[email protected]
+        with:
+          ssh-private-key: ${{ secrets.SSH_PRIVATE_KEY }}
+
+      - name: Install Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: '3.4.1'
+          bundler-cache: true
+
+      - name: Install Kamal
+        run: gem install kamal
+
+      - name: Deploy with Kamal
+        env:
+          KAMAL_REGISTRY_PASSWORD: ${{ secrets.KAMAL_REGISTRY_PASSWORD }}
+        run: |
+          kamal deploy