GitHub workflows update

.github/dependabot.yaml

@@ -0,0 +1,6 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "daily"

.github/workflows/publish.yaml

@@ -0,0 +1,56 @@
+name: Publish Docker image
+
+on:
+  release:
+    types:
+      - published
+
+env:
+  GITHUB_REGISTRY_IMAGE: ghcr.io/${{ github.repository_owner }}/ikev2-strongswan-vpn
+  DOCKER_REGISTRY_IMAGE: docker.io/aeron/ikev2-strongswan-vpn
+
+jobs:
+  build:
+    name: Build and push
+    runs-on: ubuntu-latest
+    permissions:
+      packages: write
+      contents: read
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+      - id: recase
+        uses: ASzc/change-string-case-action@v2
+        with:
+          string: ${{ env.GITHUB_REGISTRY_IMAGE }}
+      - name: Set up QEMU
+        uses: docker/[email protected]
+      - name: Build Image
+        id: build-image
+        uses: redhat-actions/buildah-build@v2
+        with:
+          tags: >-
+            ${{ steps.recase.outputs.lowercase }}:latest
+            ${{ steps.recase.outputs.lowercase }}:${{ github.ref_name }}
+            ${{ env.DOCKER_REGISTRY_IMAGE }}:latest
+            ${{ env.DOCKER_REGISTRY_IMAGE }}:${{ github.ref_name }}
+          platforms: linux/amd64, linux/arm64
+          containerfiles: |
+            ./dockerfile
+      - name: Log into GitHub Container Registry
+        uses: redhat-actions/podman-login@v1
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ github.token }}
+      - name: Log into Docker Hub
+        uses: redhat-actions/podman-login@v1
+        with:
+          registry: docker.io
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+      - name: Push to registries
+        uses: redhat-actions/push-to-registry@v2
+        with:
+          tags: ${{ steps.build-image.outputs.tags }}