update charts
diff --git a/charts/k8s-gerrit/container-images/git-gc/Dockerfile b/charts/k8s-gerrit/container-images/git-gc/Dockerfile
new file mode 100644
index 0000000..2293b12
--- /dev/null
+++ b/charts/k8s-gerrit/container-images/git-gc/Dockerfile
@@ -0,0 +1,13 @@
+ARG TAG=latest
+FROM base:${TAG}
+
+COPY tools/* /var/tools/
+
+RUN mkdir -p /var/log/git && \
+    chown gerrit:users /var/log/git
+
+USER gerrit
+
+VOLUME ["/var/gerrit/git"]
+
+ENTRYPOINT ["/var/tools/gc.sh"]