Merge branch 'docs/aws-install' into 'master'

Add AWS installation docs

Closes #49501

See merge request gitlab-org/gitlab-ce!20778

doc/install/README.md

@@ -34,11 +34,11 @@ the hardware requirements.
 - [Install GitLab on Google Cloud Platform](google_cloud_platform/index.md)
 - [Install GitLab on Google Kubernetes Engine (GKE)](https://about.gitlab.com/2017/01/23/video-tutorial-idea-to-production-on-google-container-engine-gke/): video tutorial on
 the full process of installing GitLab on Google Kubernetes Engine (GKE), pushing an application to GitLab, building the app with GitLab CI/CD, and deploying to production.
-- [Install on AWS](https://about.gitlab.com/aws/)
-- _Testing only!_ [DigitalOcean and Docker Machine](digitaloceandocker.md) -
-  Quickly test any version of GitLab on DigitalOcean using Docker Machine.
+- [Install on AWS](aws/index.md): Install GitLab on AWS using the community AMIs that GitLab provides.
 - [Getting started with GitLab and DigitalOcean](https://about.gitlab.com/2016/04/27/getting-started-with-gitlab-and-digitalocean/): requirements, installation process, updates.
 - [Demo: Cloud Native Development with GitLab](https://about.gitlab.com/2017/04/18/cloud-native-demo/): video demonstration on how to install GitLab on Kubernetes, build a project, create Review Apps, store Docker images in Container Registry, deploy to production on Kubernetes, and monitor with Prometheus.
+- _Testing only!_ [DigitalOcean and Docker Machine](digitaloceandocker.md) -
+  Quickly test any version of GitLab on DigitalOcean using Docker Machine.
 
 ## Database