Add GitHub Actions files

.github/workflows/docker-publish.yml

@@ -0,0 +1,131 @@
+name: Publish Docker Image
+
+on:
+  schedule:
+    - cron: '20 5 * * *'
+  pull_request:
+    branches:
+      - main
+    paths-ignore:
+      - '.git*'
+      - 'docker-compose.yml'
+      - 'README.*'
+  push:
+    branches:
+      - main
+    paths-ignore:
+      - '.git*'
+      - 'docker-compose.yml'
+      - 'README.*'
+  workflow_dispatch:
+
+env:
+  IMAGE_BASE: library/alpine:latest
+  REPO_NAME: ${{ github.event.repository.name }}
+  REGISTRY_URL: docker.io
+  REGISTRY_USERNAME: ${{ secrets.DOCKERHUB_USERNAME }}
+  REGISTRY_PASSWORD: ${{ secrets.DOCKERHUB_PASSWORD }}
+
+jobs:
+
+  variables:
+    runs-on: ubuntu-latest
+    outputs:
+      image_name: ${{ steps.split.outputs.image_name }}
+    steps:
+      - name: Set name of image
+        id: split
+        run: echo "image_name=${REPO_NAME#*-}" >> $GITHUB_OUTPUT
+
+  check:
+    needs: variables
+    runs-on: ubuntu-latest
+    env:
+      IMAGE_NAME: ${{ needs.variables.outputs.image_name }}
+    outputs:
+      image-needs-updating: ${{ steps.check.outputs.needs-updating }}
+    steps:
+      - name: Check if update available
+        id: check
+        uses: lucacome/docker-image-update-checker@v1.2.0
+        with:
+          base-image: ${{ env.IMAGE_BASE }}
+          image: ${{ env.REGISTRY_USERNAME }}/${{ env.IMAGE_NAME }}
+        if: github.event_name == 'schedule'
+
+  build:
+
+    needs: [check, variables]
+
+    env:
+      IMAGE_NAME: ${{ needs.variables.outputs.image_name }}
+
+    if: |
+      github.event_name != 'schedule' ||
+      needs.check.outputs.image-needs-updating == 'true'
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Log into registry
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@v2
+        with:
+          registry: ${{ env.REGISTRY_URL }}
+          username: ${{ env.REGISTRY_USERNAME }}
+          password: ${{ env.REGISTRY_PASSWORD }}
+
+      - name: Extract Docker metadata
+        if: github.event_name != 'pull_request'
+        id: meta
+        uses: docker/metadata-action@v4
+        with:
+          images: |
+            ${{ env.REGISTRY_URL }}/${{ env.REGISTRY_USERNAME }}/${{ env.IMAGE_NAME }}
+          flavor: |
+            latest=false
+          labels: |
+            org.opencontainers.image.base.name=docker.io/${{ env.IMAGE_BASE }}
+          tags: |
+            type=sha
+            type=schedule,pattern={{date 'YYYYMMDD'}}
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+            type=raw,value=latest,enable={{is_default_branch}}
+
+      - name: Extract Docker PR tag
+        if: github.event_name == 'pull_request'
+        id: meta_pr
+        uses: docker/metadata-action@v4
+        with:
+          images: |
+            ${{ env.REGISTRY_URL }}/${{ env.REGISTRY_USERNAME }}/${{ env.IMAGE_NAME }}
+          flavor: |
+            latest=false
+          tags: |
+            type=sha
+            type=ref,event=pr
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+
+      - name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v2
+
+      - name: Build and push Docker image
+        id: build-and-push
+        uses: docker/build-push-action@v3
+        env:
+          ACTIONS_RUNTIME_TOKEN: ''
+        with:
+          context: .
+          build-args: |
+            BASE_IMAGE=${{ env.IMAGE_BASE }}
+          platforms: linux/386, linux/amd64, linux/arm64
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}

.github/workflows/update-readme.yml

@@ -0,0 +1,53 @@
+name: Update README
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - 'README.*'
+  workflow_dispatch:
+
+env:
+  REPO_NAME: ${{ github.event.repository.name }}
+  REGISTRY_URL: docker.io
+  REGISTRY_USERNAME: ${{ secrets.DOCKERHUB_USERNAME }}
+  REGISTRY_PASSWORD: ${{ secrets.DOCKERHUB_PASSWORD }}
+
+jobs:
+
+  variables:
+    runs-on: ubuntu-latest
+    outputs:
+      image_name: ${{ steps.split.outputs.image_name }}
+    steps:
+      - name: Set name of image
+        id: split
+        run: echo "image_name=${REPO_NAME#*-}" >> $GITHUB_OUTPUT
+
+  update:
+
+    needs: variables
+    runs-on: ubuntu-latest
+    env:
+      IMAGE_NAME: ${{ needs.variables.outputs.image_name }}
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Log into registry
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@v2
+        with:
+          registry: ${{ env.REGISTRY_URL }}
+          username: ${{ env.REGISTRY_USERNAME }}
+          password: ${{ env.REGISTRY_PASSWORD }}
+
+      - name: Update repo description
+        uses: peter-evans/dockerhub-description@v3
+        with:
+          username: ${{ env.REGISTRY_USERNAME }}
+          password: ${{ env.REGISTRY_PASSWORD }}
+          repository: ${{ env.REGISTRY_USERNAME }}/${{ env.IMAGE_NAME }}
+          short-description: ${{ github.event.repository.description }}