content: update link in Docker article
Fixes golang/go#14506
Change-Id: Ib1534a9641cccaa2693932a9b55c6367dcce35a4
Reviewed-on: https://go-review.googlesource.com/19875
Reviewed-by: Rob Pike <r@golang.org>
diff --git a/content/docker.article b/content/docker.article
index 942bcf1..522690c 100644
--- a/content/docker.article
+++ b/content/docker.article
@@ -12,7 +12,7 @@
In this article we'll walk through a recipe for creating a Docker container for
a simple Go web application and deploying that container to Google Compute Engine.
If you're not familiar with Docker, you should read
-[[http://docs.docker.com/introduction/understanding-docker/][Understanding Docker]]
+[[https://docs.docker.com/engine/understanding-docker/][Understanding Docker]]
before reading on.
* The demo app
