Merge pull request #30619 from johndmulhausen/patch-3

Fix for 404 in docs

docs/reference/builder.md

@@ -2,6 +2,8 @@
 title: "Dockerfile reference"
 description: "Dockerfiles use a simple DSL which allows you to automate the steps you would normally manually take to create an image."
 keywords: "builder, docker, Dockerfile, automation, image creation"
+redirect_from:
+- /reference/builder/
 ---
 
 <!-- This file is maintained within the docker/docker Github