diff --git a/docker-entrypoint.sh b/docker-entrypoint.sh
index 5b5d01825e..a353696b74 100755
--- a/docker-entrypoint.sh
+++ b/docker-entrypoint.sh
@@ -1,4 +1,5 @@
 #!/bin/sh
+# https://stackoverflow.com/questions/25503412/how-do-i-know-when-my-docker-mysql-container-is-up-and-mysql-is-ready-for-taking
 
 set -e