Resolves link to introduction to Docker

Signed-off-by: Spencer Smith <robertspencersmith@gmail.com>

docs/userguide/index.md

@@ -10,7 +10,7 @@ parent = "mn_fun_docker"
 
 # Welcome to the Docker user guide
 
-In the [Introduction](/) you got a taste of what Docker is and how it
+In the [Introduction](/misc) you got a taste of what Docker is and how it
 works. In this guide we're going to take you through the fundamentals of
 using Docker and integrating it into your environment.