diff --git a/container_to_container/README.md b/container_to_container/README.md
index 11e2d06..3fa6d94 100644
--- a/container_to_container/README.md
+++ b/container_to_container/README.md
@@ -43,4 +43,6 @@ And then
 
 up.sh
 
+Don't forget to set you proxy correctly. An example for nginx see nginx.conf.
+
 A full working setup can be found here https://github.com/davrot/overleaf