feat: also publish docker image to ghcr

.github/workflows/docker-publish.yml

@@ -59,6 +59,9 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 360
     needs: test
+    permissions:
+      contents: read
+      packages: write
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -93,6 +96,13 @@ jobs:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
 
+      - name: Login to GHCR
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
       - name: Build and Push Multi-Arch Image
         uses: docker/build-push-action@v6
         with:
@@ -102,6 +112,8 @@ jobs:
           tags: |
             ${{ env.REGISTRY_IMAGE }}:${{ env.VERSION }}
             ${{ env.REGISTRY_IMAGE }}:latest
+            ghcr.io/${{ github.repository }}:${{ env.VERSION }}
+            ghcr.io/${{ github.repository }}:latest
           cache-from: type=gha
           cache-to: type=gha,mode=max
           # GitHub Actions env piped through so build.rs stamps