Workaround for old version of Skopeo

.github/workflows/devcontainer-ci.yml

@@ -24,6 +24,16 @@ jobs:
               uses: docker/setup-buildx-action@v3
               with:
                   use: true
+            - name: Install updated Skopeo
+              # This can be omitted once runner images have a version of Skopeo > 1.4.1
+              # See https://github.com/containers/skopeo/issues/1874
+              run: |
+                  REPO_URL="https://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/unstable/xUbuntu_22.04"
+                  sudo sh -c "echo 'deb ${REPO_URL}/ /' > /etc/apt/sources.list.d/skopeo.list"
+                  curl -fsSL ${REPO_URL}/Release.key | gpg --dearmor | sudo tee /etc/apt/trusted.gpg.d/skopeo.gpg > /dev/null
+
+                  sudo apt update
+                  sudo apt install skopeo
             - name: Login to Docker Hub
               uses: docker/login-action@v2
               with: