Merge pull request #565 from microbiomedata/564-publish-container-ima…

…ges-to-github-container-registry-ghcr-instead-of-docker-hub

Configure GitHub Actions to push container image to GitHub Container Registry (in addition to Docker Hub)

.github/workflows/build-and-release-to-spin.yml

@@ -50,6 +50,7 @@ jobs:
         with:
           images: |
             microbiomedata/nmdc-runtime-${{ matrix.image }}
+            ghcr.io/microbiomedata/nmdc-runtime-${{ matrix.image }}
           flavor: |
             latest=false
           tags: |
@@ -63,6 +64,14 @@ jobs:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
 
+      # Reference: https://docs.docker.com/build/ci/github-actions/push-multi-registries/
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
       - name: Build and push
         uses: docker/build-push-action@v5
         with: