Log in to GHCR

Author: ianroberts

.github/workflows/build-docker.yml

@@ -16,6 +16,14 @@ jobs:
         # so we have to do it ourselves in a script.
         run: echo "repoowner=${{ github.repository_owner }}" | tr 'A-Z' 'a-z' >> "$GITHUB_OUTPUT"
 
+      -
+        name: Login to GitHub Container Registry
+        uses: docker/login-action@v2
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
       -
         name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3