diff --git a/Dockerfile b/Dockerfile
index d8135ca..4818439 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -11,6 +11,7 @@ RUN apt-get update && \
     echo "student ALL=(tt) /usr/local/bin/joj3" > /etc/sudoers.d/joj
 
 # install joint-teapot
+# TODO: change it to FOCS gitea mirror for deployment
 RUN pip install --no-cache-dir git+https://mirror.ghproxy.com/https://github.com/BoYanZh/Joint-Teapot
 
 # install joj3 binary