diff --git a/charts/k8s-gerrit/container-images/git-gc/README.md b/charts/k8s-gerrit/container-images/git-gc/README.md
new file mode 100644
index 0000000..2509f99
--- /dev/null
+++ b/charts/k8s-gerrit/container-images/git-gc/README.md
@@ -0,0 +1,19 @@
+# Git GC container image
+
+Container for running `git gc`. It is meant to run as a CronJob, when used in
+Kubernetes. It can also be used to run garbage collection on-demand, e.g. using
+a Kubernetes Job.
+
+## Content
+
+* base image
+* `gc.sh`: gc-script
+
+## Setup and configuration
+
+* copy tools scripts
+* ensure filesystem permissions
+
+## Start
+
+*  execution of the provided `gc.sh`