Log into container registry

.forgejo/workflows/cache.yaml

@@ -3,7 +3,7 @@ jobs:
   push:
     runs-on: docker
     container:
-      image: git.kun.is/home/forgejo-nix-action:17bb63e3d5ba294e0c11b2868e41243de1ca803f
+      image: git.kun.is/home/forgejo-nix-action:958559e3184d8f044136ad49ed57f0badb67789c
     steps:
       - name: Clone repository
         run: git clone https://git.kun.is/home/container-images.git checkout
@@ -11,6 +11,8 @@ jobs:
         run: |
           /bin/attic login local https://attic.kun.is ${{ secrets.ATTIC_TOKEN }}
           /bin/attic use home
+      - name: Log into container registry
+        run: echo -n "${{ secrets.RUNNER_TOKEN }}" | /bin/docker login https://git.kun.is --username pim --password-stdin
       - name: Build Pim's blog
         run: nix build --extra-experimental-features nix-command --extra-experimental-features flakes --out-link blog-pim ./checkout#packages.x86_64-linux.blog-pim
       - name: Push Pim's blog to Nix cache