Update Dockerize repo URL from jwilder/dockerize->powerman/dockerize

Author: Keith Scheiwiller

Diff for: compose/startup-order.md

@@ -29,7 +29,7 @@ need this level of resilience, you can work around the problem with a wrapper
 script:
 
 - Use a tool such as [wait-for-it](https://github.com/vishnubob/wait-for-it),
-  [dockerize](https://github.com/jwilder/dockerize), sh-compatible
+  [dockerize](https://github.com/powerman/dockerize), sh-compatible
   [wait-for](https://github.com/Eficode/wait-for), or [RelayAndContainers](https://github.com/jasonsychau/RelayAndContainers) template. These are small
   wrapper scripts which you can include in your application's image to
   poll a given host and port until it's accepting TCP connections.