Switch to Buildah image generation

.github/workflows/ghcr-publish.yml

@@ -0,0 +1,50 @@
+name: OCI Image CI
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+env:
+    IMAGE_NAME: caddy-cloudflare
+    IMAGE_TAGS: latest ${{ github.sha }}
+    IMAGE_REGISTRY: ghcr.io/${{ github.repository_owner }}
+    REGISTRY_USER: ${{ github.actor }}
+    REGISTRY_PASSWORD: ${{ github.token }}
+
+jobs:
+  push-ghcr:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+      id-token: write
+
+    steps:
+      # Checkout push-to-registry action github repository
+      - name: Checkout Push to Registry action
+        uses: actions/checkout@v4
+
+      # Build image using Buildah action
+      - name: Build Image
+        id: build_image
+        uses: redhat-actions/buildah-build@v2
+        with:
+          image: ${{ env.IMAGE_NAME }}
+          tags: ${{ env.IMAGE_TAGS }}
+          containerfiles: |
+            ./Containerfile
+
+      # Push the image to GHCR (Image Registry)
+      - name: Push To GHCR
+        uses: redhat-actions/push-to-registry@v2
+        id: push
+        with:
+          image: ${{ steps.build_image.outputs.image }}
+          tags: ${{ steps.build_image.outputs.tags }}
+          registry: ${{ env.IMAGE_REGISTRY }}
+          username: ${{ env.REGISTRY_USER }}
+          password: ${{ env.REGISTRY_PASSWORD }}
+          extra-args: |
+            --disable-content-trust