automate build of packer-resource in github actions + publish in ghcr

.github/workflows/publish-packer-resource-image.yml

@@ -0,0 +1,38 @@
+name: Publish Actions Runner Image
+
+on:
+  push:
+    branches:
+      - master
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository_owner }}/packer-resource
+
+jobs:
+  build-latest:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Set up QEMU #emulation support with QEMU to be able to build against more platforms.
+        uses: docker/setup-qemu-action@v3
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Build and push the container to GitHub Container Registry using the latest tag
+        uses: docker/[email protected]
+        with:
+          context: .
+          file: Dockerfile
+          platforms: |
+            linux/amd64
+          tags: |
+            ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest
+          push: true
+          provenance: false