diff --git a/docker/Dockerfile b/docker/Dockerfile
index 8c85db1..b71da2f 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -5,11 +5,12 @@
 EXPOSE 29418
 EXPOSE 8080
 
+# environment variables
 ENV GITBUCKET_HOST 0.0.0.0
 ENV GITBUCKET_PORT 8080
 ENV GITBUCKET_HOME /srv/gitbucket
 
-# mark voulmes
+# mark volumes
 VOLUME $GITBUCKET_HOME/repositories
 VOLUME $GITBUCKET_HOME/data
 VOLUME $GITBUCKET_HOME/gist