adding index

index.html

 <h1>This is a test</h1>
 <h2>Oooooo it works</h2>
-<h3>I am a webpage on GitLab</h3>
+<h3>I am a webpage on <a href="https://gitlab.isb-sib.ch/dteixeir/about-me/blob/master/index.html">GitLab</a></h3>
 <h4>served by rawgit</h4>