diff --git a/README.md b/README.md
index 7c10ccc..ed15449 100644
--- a/README.md
+++ b/README.md
@@ -9,3 +9,5 @@ We provide a few containers for you to use:
 - `ubuntu-latest`: A container [provided by `catthehacker`](https://ghcr.io/catthehacker/ubuntu:act-22.04) that mostly mimics the GitHub `ubuntu-latest` runner. Use this if you simply want to run CI based on existing GitHub Actions configurations. While compatibility is not guaranteed (please read the [Forgejo Actions documentation](https://forgejo.org/docs/latest/user/actions/) either way), we’re certain it will just work in most cases.
 - `alpine`: The `alpine:latest` (aka. `edge`) container, which is the official Alpine container. Use this container if you’re writing a new action. It is fast and small :)
 - `alpine-latex`: An Alpine container with most TeX Live utilities preinstalled. This container is built from our [Containerfile](Containerfile.alpine-latex) once per week. Use this if you need to build LaTeX files (ideally with XeTeX) -- it saves a lot of CI time.
+
+All three containers are also published to the [local container registry](https://git.ctbk.de/infra/-/packages), so you can test your actions locally with `forgejo-runner exec`.
diff --git a/build-containers.sh b/build-containers.sh
index 6c76778..747422b 100755
--- a/build-containers.sh
+++ b/build-containers.sh
@@ -5,5 +5,13 @@ BASEDIR=/etc/forgejo-runner
 for container in "$BASEDIR"/Containerfile.*; do
 	base=$(basename "$container")
 	tag=${base#"Containerfile."}
-	podman build -t "$tag" --cpu-quota 50000 -f "$container" $BASEDIR
+	podman build -t "git.ctbk.de/infra/$tag" --cpu-quota 50000 -f "$container" $BASEDIR
+	podman push "git.ctbk.de/infra/$tag"
 done
+
+# extra container tags and pushes for things that we don’t build, but need
+podman tag data.forgejo.org/oci/alpine:latest git.ctbk.de/infra/alpine:latest
+podman tag ghcr.io/catthehacker/ubuntu:act-22.04 git.ctbk.de/infra/ubuntu:act-22.04
+
+podman push git.ctbk.de/infra/alpine:latest
+podman push git.ctbk.de/infra/ubuntu:act-22.04
\ No newline at end of file
diff --git a/config.yml b/config.yml
index 83e1c78..7cc4c26 100644
--- a/config.yml
+++ b/config.yml
@@ -37,7 +37,7 @@ runner:
   # The labels of a runner are used to determine which jobs the runner can run, and how to run them.
   # If it's empty when registering, it will ask for inputting labels.
   # Remember to delete .runner when you modify this, otherwise the new labels will not get applied!
-  labels: ["ubuntu-latest:docker://ghcr.io/catthehacker/ubuntu:act-22.04", "alpine:docker://data.forgejo.org/oci/alpine:latest", "alpine-latex:docker://localhost/alpine-latex:latest"]
+  labels: ["ubuntu-latest:docker://git.ctbk.de/infra/ubuntu:act-22.04", "alpine:docker://git.ctbk.de/infra/alpine:latest", "alpine-latex:docker://git.ctbk.de/infra/alpine-latex:latest"]
 
 cache:
   # Enable cache server to use actions/cache.