Initial testing

.github/renovate.json

@@ -0,0 +1,4 @@
+{
+    "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+    "extends": ["github>ivuorinen/.github:renovate-config"]
+}

.github/workflows/docker-image.yml

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+name: GitHub Docker Registry Build
+
+on:
+  schedule:
+    - cron: '41 1 * * *'
+  push:
+    branches: [ "main" ]
+  workflow_dispatch:
+
+env:
+  # Use docker.io for Docker Hub if empty
+  REGISTRY: ghcr.io
+  # github.repository as <account>/<repo>
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+
+  build:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        php: [php74, php80, php81, php82]
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
+      - name: Publish to Registry (${{ matrix.php }})
+        uses: elgohr/Publish-Docker-Github-Action@v5
+        with:
+          name: ${{ env.IMAGE_NAME }}/php-imagick
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+          registry: ghcr.io
+          tags: ${{ matrix.phpDir }}
+          dockerfile: Dockerfile-${{ matrix.php }}
+          default_branch: main
+          platforms: linux/amd64,linux/arm64
+          cache: ${{ github.event_name != 'schedule' }}