chore(release): prepare release branch (#4)

* chore(release): add mergify config

* ci(quay): add quay CI

* use Containerfile

.github/workflows/ci.yml

@@ -0,0 +1,71 @@
+name: CI build and push
+
+concurrency:
+  group: ci-${{ github.run_id }}
+  cancel-in-progress: true
+
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - main
+      - v[0-9]+
+      - v[0-9]+.[0-9]+
+      - cryostat-v[0-9]+.[0-9]+
+
+env:
+  CI_USER: cryostat+bot
+  CI_REGISTRY: quay.io/cryostat
+  CI_IMG: quay.io/cryostat/openshift-oauth-proxy
+  REPOSITORY: ${{ github.event.pull_request.head.repo.full_name }}
+  REF: ${{ github.event.pull_request.head.ref }}
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Install qemu
+      continue-on-error: false
+      run: |
+        sudo apt-get update
+        sudo apt-get install -y qemu-user-static
+    - name: Get date tag
+      run: echo "DATE_TAG=$(date -uI)" >> "$GITHUB_ENV"
+    - name: Check release branch
+      id: check-branch
+      run: |
+        if [[ ${REF_NAME} == cryostat-v* ]]; then
+          echo "image-tag=${REF_NAME:10}-dev" >> $GITHUB_OUTPUT
+        else
+          echo "image-tag=${REF_NAME}" >> $GITHUB_OUTPUT
+        fi
+    - name: Check commit git tag
+      id: check-commit
+      run: |
+        output=$(git describe --tags --exact-match 2>/dev/null | sed -e "s/^v//" || echo -n '')
+        echo "::set-output name=image-tag::$output"
+        echo "::set-output name=image-tag-patch::${output:0:3}"
+        echo "::set-output name=image-tag-release::${output:0:1}"
+    - name: Build container images and manifest
+      id: buildah-build
+      uses: redhat-actions/buildah-build@v2
+      with:
+        image: ${{ env.CI_IMG }}
+        archs: amd64, arm64
+        tags: ${{ github.ref_name }} ${{ github.ref == 'refs/heads/main' && 'latest' || '' }} ${{ env.DATE_TAG }} ${{ steps.check-branch.outputs.image-tag }} ${{ steps.check-commit.outputs.image-tag }} ${{ steps.check-commit.outputs.image-tag-patch }} ${{ steps.check-commit.outputs.image-tag-release }}
+        containerfiles: |
+          ./Containerfile
+    - name: Push to quay.io
+      id: push-to-quay
+      uses: redhat-actions/push-to-registry@v2
+      with:
+        image: openshift-oauth-proxy
+        tags: ${{ steps.buildah-build.outputs.tags }}
+        registry: ${{ env.CI_REGISTRY }}
+        username: ${{ env.CI_USER }}
+        password: ${{ secrets.REGISTRY_PASSWORD }}
+      if: ${{ github.repository_owner == 'cryostatio' }}
+    - name: Print image URL
+      run: echo "Image pushed to ${{ steps.push-to-quay.outputs.registry-paths }}"
+      if: ${{ github.repository_owner == 'cryostatio' }}

.mergify.yml

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+pull_request_rules:
+  - name: backport patches to cryostat-v3.0 branch
+    conditions:
+      - base=main
+      - label=backport
+    actions:
+      backport:
+        branches:
+          - cryostat-v3.0
+        assignees:
+          - "{{ author }}"
+
+  - name: auto label PRs from reviewers
+    conditions:
+      - author=@reviewers
+    actions:
+      label:
+        add:
+          - safe-to-test