Add instructions for defining stages

doc/topics/autodevops/index.md

@@ -780,15 +780,19 @@ It is also possible to copy and paste the contents of the [Auto DevOps
 template] into your project and edit this as needed. You may prefer to do it
 that way if you want to specifically remove any part of it.
-### Using components of Auto-DevOps
-If you only require a subset of the features offered by Auto-DevOps, you can include
-individual Auto-DevOps jobs into your own `.gitlab-ci.yml`.
+### Using components of Auto DevOps
+If you only require a subset of the features offered by Auto DevOps, you can include
+individual Auto DevOps jobs into your own `.gitlab-ci.yml`. Each component job relies
+on a stage that should be defined in the `.gitlab-ci.yml` that includes the template.
 For example, to make use of [Auto Build](#auto-build), you can add the following to
 your `.gitlab-ci.yml`:
 ```yaml
+stages:
+  - build
+
 include:
   - template: Jobs/Build.gitlab-ci.yml
 ```