Added tier badges to ci/services

doc/ci/services/gitlab.md

@@ -5,7 +5,7 @@ info: To determine the technical writer assigned to the Stage/Group associated w
 type: reference
 ---
 
-# Use GitLab as a microservice
+# Use GitLab as a microservice **(FREE)**
 
 Many applications need to access JSON APIs, so application tests might need access
 to APIs too. The following example shows how to use GitLab as a microservice to give

doc/ci/services/index.md

@@ -6,7 +6,7 @@ comments: false
 type: index
 ---
 
-# Services
+# Services **(FREE)**
 
 The `services` keyword defines a Docker image that runs during a `job`
 linked to the Docker image that the image keyword defines. This allows

doc/ci/services/mysql.md

@@ -5,7 +5,7 @@ info: To determine the technical writer assigned to the Stage/Group associated w
 type: reference
 ---
 
-# Using MySQL
+# Using MySQL **(FREE)**
 
 Many applications depend on MySQL as their database, and you may
 need it for your tests to run.

doc/ci/services/postgres.md

@@ -5,7 +5,7 @@ info: To determine the technical writer assigned to the Stage/Group associated w
 type: reference
 ---
 
-# Using PostgreSQL
+# Using PostgreSQL **(FREE)**
 
 As many applications depend on PostgreSQL as their database, you
 eventually need it in order for your tests to run. Below you are guided how to

doc/ci/services/redis.md

@@ -5,7 +5,7 @@ info: To determine the technical writer assigned to the Stage/Group associated w
 type: reference
 ---
 
-# Using Redis
+# Using Redis **(FREE)**
 
 As many applications depend on Redis as their key-value store, you
 eventually need it in order for your tests to run. Below you are guided how to