title: In Gitlab why we are using the particular image if we already have gitlab runner to run the code
body: <p>I am new to Gitlab, and bit confuse with the Gitlab Image keyword..</p>
  <p>If we already have gitlab runners specified to run the commands they why are we separately use Image keywords in the gitlab-ci.yml (in Any stage or Jobs)<a href="https://i.stack.imgur.com/Bdq3u.jpg" rel="nofollow noreferrer">enter image description here</a></p>