Publish images to GHCR (#504)

Signed-off-by: Pavol Loffay <[email protected]>

Author: pavolloffay

.github/workflows/publish-images.yaml

@@ -32,7 +32,7 @@ jobs:
         id: docker_meta
         uses: docker/[email protected]
         with:
-          images: quay.io/opentelemetry/opentelemetry-operator
+          images: quay.io/opentelemetry/opentelemetry-operator,ghcr.io/open-telemetry/opentelemetry-operator/opentelemetry-operator
           tag-semver: |
             {{raw}}
             {{version}}
@@ -59,6 +59,13 @@ jobs:
           username: ${{ secrets.QUAY_USERNAME }}
           password: ${{ secrets.QUAY_PASSWORD }}
 
+      - name: Login to GitHub Package Registry
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
       - name: Build and push Operator image
         uses: docker/[email protected]
         with: