Merge branch 'docs-install-free-self' into 'master'

Add tier badge info to install pages

See merge request gitlab-org/gitlab!55290

doc/install/aws/index.md

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-# Installing GitLab on Amazon Web Services (AWS)
+# Installing GitLab on Amazon Web Services (AWS) **(FREE SELF)**
 
 This page offers a walkthrough of a common configuration
 for GitLab on AWS using the official GitLab Linux package. You should customize it to accommodate your needs.

doc/install/azure/index.md

@@ -6,7 +6,7 @@ description: 'Learn how to spin up a pre-configured GitLab VM on Microsoft Azure
 type: howto
 ---
 
-# Install GitLab on Microsoft Azure
+# Install GitLab on Microsoft Azure **(FREE SELF)**
 
 WARNING:
 This guide is deprecated and pending an update. For the time being, use the GitLab

doc/install/digitaloceandocker.md

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-# Digital Ocean and Docker Machine test environment
+# Digital Ocean and Docker Machine test environment **(FREE SELF)**
 
 This guide is for quickly testing different versions of GitLab and not
 recommended for ease of future upgrades or keeping the data you create.

doc/install/docker.md

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 ---
 
-# Install GitLab with Docker
+# Install GitLab with Docker **(FREE SELF)**
 
 [Docker](https://www.docker.com) and container technology have been revolutionizing the software world for the past few years. They combine the performance and efficiency of native execution with the abstraction, security, and immutability of virtualization.
 

doc/install/google_cloud_platform/index.md

@@ -6,7 +6,7 @@ description: 'Learn how to install a GitLab instance on Google Cloud Platform.'
 type: howto
 ---
 
-# Installing GitLab on Google Cloud Platform
+# Installing GitLab on Google Cloud Platform **(FREE SELF)**
 
 This guide will help you install GitLab on a [Google Cloud Platform (GCP)](https://cloud.google.com/) using the official GitLab Linux package. You should customize it to accommodate your needs.
 

doc/install/installation.md

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-# Installation from source
+# Installation from source **(FREE SELF)**
 
 This is the official installation guide to set up a production GitLab server
 using the source files. To set up a **development installation** or for many

doc/install/openshift_and_gitlab/index.md

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 ---
 
-# How to install GitLab on OpenShift Origin 3
+# How to install GitLab on OpenShift Origin 3 **(FREE SELF)**
 
 WARNING:
 This article is deprecated. Use the official Kubernetes Helm charts for

doc/install/postgresql_extensions.md

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 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
 ---
 
-# Managing PostgreSQL extensions
+# Managing PostgreSQL extensions **(FREE SELF)**
 
 This guide documents how to manage PostgreSQL extensions for installations with an external
 PostgreSQL database.

doc/install/relative_url.md

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 type: reference
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-# Install GitLab under a relative URL
+# Install GitLab under a relative URL **(FREE SELF)**
 
 While it is recommended to install GitLab on its own (sub)domain, sometimes
 this is not possible due to a variety of reasons. In that case, GitLab can also

doc/install/requirements.md

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 type: reference
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-# Requirements
+# Requirements **(FREE SELF)**
 
 This page includes useful information on the supported Operating Systems as well
 as the hardware requirements that are needed to install and use GitLab.