Add GitHub action for building and pushing images to GitHub Container Registry (GHCR)

Author: andyone

.github/workflows/ghcr.yml

@@ -0,0 +1,59 @@
+name: "GHCR Publish"
+
+on:
+  release:
+    types: [published]
+
+permissions:
+  packages: write
+  contents: read
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  GHCR:
+    name: GHCR Build & Publish
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Login to DockerHub
+        uses: docker/login-action@v2
+        env:
+          DOCKERHUB_USERNAME: ${{ secrets.DOCKERHUB_USERNAME }}
+        if: ${{ env.DOCKERHUB_USERNAME != '' }}
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v2
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@v4
+        with:
+          images: ${{env.REGISTRY}}/${{env.IMAGE_NAME}}
+          flavor: latest=true
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v3
+        with:
+          context: .
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+
+      - name: Show info about built Docker image
+        uses: essentialkaos/docker-info-action@v1
+        with:
+          image: ${{env.REGISTRY}}/${{env.IMAGE_NAME}}:latest
+          show-labels: true