Publish merged image

Author: LouisMT

.github/workflows/ci.yaml

@@ -58,3 +58,35 @@ jobs:
           path: ${{ runner.temp }}/digests/*
           if-no-files-found: error
           retention-days: 1
+
+  publish-docker-image:
+    name: Publish Docker image
+
+    runs-on: ubuntu-latest
+
+    needs:
+      - build-docker-image
+
+    steps:
+      - name: Download digests
+        uses: actions/download-artifact@v4
+        with:
+          path: ${{ runner.temp }}/digests
+          pattern: digests-*
+          merge-multiple: true
+
+      - name: Login to GHCR
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Create manifest list and push
+        working-directory: ${{ runner.temp }}/digests
+        run: |
+          docker buildx imagetools create -t ghcr.io/louismt/ddns-proxy:latest \
+            $(printf 'ghcr.io/louismt/ddns-proxy@sha256:%s ' *)