title: How to trigger azure devops build pipeline based on the commit message?
body: <p>How can I get a build triggered off of a specific commit?</p>
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  <p>I am building an Azure Devops project. the project has both UI and Backend application codes. Both the codes are placed as a single project in GitLab. But different teams are working for UI and Backend.
  I need to configure two build pipelines one for UI changes and one for backend changes.</p>
  <p>What I need is to trigger a specific pipeline based on the commit messages.
  ie; if a UI change is made, then the commit message will contain a keyword &quot;<em>UI_CHANGES</em>&quot; in it. The Azure DevOps should recognize this and trigger the UI build pipeline.</p>
  <p>Can I make use of Git tags here or other possible ideas?</p>