Also push docker images to ghcr.io

With docker-hub starting to introduce a much stricter limit on anonymous
pulls, it makes sense to also host the image in ghcr.io as well,
allowing users flexibility in where they pull the docker images from.

Also with the github action it makes more sense hosting the docker image
on github infrastructure.

I've introduced a github action for logging into registries as well.

.github/workflows/docker-release.yml

@@ -30,6 +30,19 @@ jobs:
       - name: Available platforms
         run: echo ${{ steps.buildx.outputs.platforms }} && docker version
 
+      - name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
       - name: Build and push image
         run: |
           echo "GithubRef: ${GITHUB_REF}"
@@ -41,7 +54,6 @@ jobs:
           PLATFORMS="linux/amd64,linux/ppc64le,linux/arm64,linux/arm/v7"
 
           echo "Building and pushing version ${IMAGE_VERSION} of image ${IMAGE_NAME}"
-          echo '${{ secrets.DOCKER_PASSWORD }}' | docker login -u '${{ secrets.DOCKER_USERNAME }}' --password-stdin
           docker buildx build \
             --label "org.opencontainers.image.authors=https://github.com/mikefarah/yq/graphs/contributors" \
             --label "org.opencontainers.image.created=$(date --rfc-3339=seconds)" \
@@ -59,6 +71,9 @@ jobs:
             -t "${IMAGE_NAME}:${IMAGE_VERSION}" \
             -t "${IMAGE_NAME}:4" \
             -t "${IMAGE_NAME}:latest" \
+            -t "ghcr.io/${IMAGE_NAME}:${IMAGE_VERSION}" \
+            -t "ghcr.io/${IMAGE_NAME}:4" \
+            -t "ghcr.io/${IMAGE_NAME}:latest" \
             .
 
           cd github-action
@@ -79,4 +94,7 @@ jobs:
             -t "${IMAGE_NAME}:${IMAGE_VERSION}-githubaction" \
             -t "${IMAGE_NAME}:4-githubaction" \
             -t "${IMAGE_NAME}:latest-githubaction" \
+            -t "ghcr.io/${IMAGE_NAME}:${IMAGE_VERSION}-githubaction" \
+            -t "ghrc.io/${IMAGE_NAME}:4-githubaction" \
+            -t "ghcr.io/${IMAGE_NAME}:latest-githubaction" \
             .