[docker] Tag latest-release for stable latest tagging (#6573)

Author: jimschubert

.github/workflows/docker-tag-latest-release.yml

@@ -0,0 +1,62 @@
+name: Docker Tag latest-release
+
+# Run every couple of days
+on:
+  schedule:
+  - cron: "* */48 * * *"
+
+jobs:
+  # This pulls all containers for the last known release tag, and tags as latest-release or x-latest-release for shared repo
+  tagLatestRelease:
+    runs-on: ubuntu-latest
+
+    steps:
+
+    # Pull the code so we have git metadata
+    - name: Checkout code
+      uses: actions/checkout@v2
+
+    # This action will "unshallow" so we have all tag info
+    - name: Get latest tag
+      id: tagger
+      uses: jimschubert/query-tag-action@v1
+      with:
+        include: 'v*'
+        exclude: '*-rc*'
+        commit-ish: 'HEAD~'
+
+    - name: DockerHub Login
+      run: echo "${{ secrets.DOCKER_PASSWORD }}" | docker login -u "${{ secrets.DOCKER_USERNAME }}" --password-stdin
+    
+    # Tags openapitools/openapi-generator-online, which is an automated build
+    - name: "Tag openapi-generator-online:x"
+      id: tag-openapi-generator-online
+      run: |
+        echo Tagging as latest-release: ${{steps.tagger.outputs.tag}}'
+        docker pull openapitools/openapi-generator-online:${{steps.tagger.outputs.tag}}
+        docker tag openapitools/openapi-generator-online:${{steps.tagger.outputs.tag}} openapitools/openapi-generator-online:latest-release
+        docker push openapitools/openapi-generator-online:latest-release
+
+    # Tags openapitools/openapi-generator's CLI image (this repo holds CLI + Online via tag prefix)
+    - name: "Tag openapi-generator:cli-x"
+      id: tag-cli
+      run: |
+        echo 'Tagging as latest-release: ${{steps.tagger.outputs.tag}}'
+        docker pull openapitools/openapi-generator:cli-${{steps.tagger.outputs.tag}}
+        docker tag openapitools/openapi-generator:cli-${{steps.tagger.outputs.tag}} openapitools/openapi-generator:cli-latest-release
+        docker push openapitools/openapi-generator:cli-latest-release
+
+    # Tags openapitools/openapi-generator's ONLINE image (this repo holds CLI + Online via tag prefix)
+    - name: "Tag openapi-generator:online-x"
+      id: tag-online
+      run: |
+        echo 'Tagging as latest-release: ${{steps.tagger.outputs.tag}}'
+        docker pull openapitools/openapi-generator:online-${{steps.tagger.outputs.tag}}
+        docker tag openapitools/openapi-generator:online-${{steps.tagger.outputs.tag}} openapitools/openapi-generator:online-latest-release
+        docker push openapitools/openapi-generator:online-latest-release
+
+    # Clean up docker credentials/configs/etc.
+    - name: Cleanup
+      if: always()
+      run: |
+        rm -f ${HOME}/.docker/config.json