Added environments and deployments to deploy and release area

doc/topics/release_your_application.md

@@ -4,10 +4,11 @@ group:
 info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#assignments
 ---
 
-# Release your application **(FREE)**
+# Deploy and release your application **(FREE)**
 
-Release your application internally or to the public. Use
+Deploy your application internally or to the public. Use
 flags to release features incrementally.
 
+- [Environments and deployments](../ci/environments/index.md)
 - [Releases](../user/project/releases/index.md)
 - [Feature flags](../operations/feature_flags.md)