Add R2DevOps way to setup MegaLinter on Gitlab

Fixes #3065

Author: nvuillam

README.md

@@ -89,6 +89,8 @@ _Github PR reporter_
     - [Which version to use ?](#which-version-to-use-)
     - [GitHub Action](#github-action)
     - [GitLab CI](#gitlab-ci)
+      - [Manual Setup](#manual-setup)
+      - [Using R2Devops](#using-r2devops)
     - [Azure Pipelines](#azure-pipelines)
     - [Bitbucket Pipelines](#bitbucket-pipelines)
     - [Jenkins](#jenkins)
@@ -528,6 +530,8 @@ description: Manual instructions to setup MegaLinter as a Gitlab Pipeline job
 -->
 ### GitLab CI
 
+#### Manual setup
+
 Create or update `.gitlab-ci.yml` file at the root of your repository
 
 ```yaml
@@ -558,6 +562,14 @@ Create a Gitlab access token and define it in a variable **GITLAB_ACCESS_TOKEN_M
 
 ![Screenshot](https://github.com/oxsecurity/megalinter/blob/main/docs/assets/images/TextReporter_gitlab_1.jpg?raw=true>)
 
+#### Using R2Devops
+
+![R2Devops Logo](https://github.com/oxsecurity/megalinter/blob/main/docs/assets/images/r2devops-logo.jpg?raw=true>)
+
+Out friends at [R2Devops](https://r2devops.io/) have packaged a [Gitlab-CI MegaLinter workflow](https://r2devops.io/marketplace/gitlab/r2devops/hub/mega_linter) on their [open-source templates marketplace](https://r2devops.io/marketplace), and it can post MegaLinter results in Gitlab Code Quality Reports !
+
+[![Screenshot](https://github.com/oxsecurity/megalinter/blob/main/docs/assets/images/r2devops-link.jpg?raw=true>)](https://r2devops.io/marketplace/gitlab/r2devops/hub/mega_linter)
+
 <!-- install-gitlab-section-end -->
 <!-- install-azure-section-start -->
 <!-- markdown-headers