added contact info on welcome page

docker/config/nginx/html/index.html

@@ -68,12 +68,13 @@
     <br/>
     <br/>
     <div class="links">
+        <div><a href="demo.html"><i class="material-icons">apps</i></a><span>Demo</span></div>
         <div><a href="https://www.youtube.com/playlist?list=PLNvp9GB9uBmH1NNAf-qTyj_jN2aCPISFU"><i class="material-icons">video_library</i></a><span>Videos</span></div>
-        <div><a href="demo.html"><i class="material-icons">apps</i></a><span>Hands-on</span></div>
         <div><a href="https://git-r3lab.uni.lu/Fractalis/fractalis/blob/master/README.md"><i class="material-icons">library_books</i></a><span>Fractalis</span></div>
         <div><a href="https://git-r3lab.uni.lu/Fractalis/fractal.js/blob/master/README.md"><i class="material-icons">library_books</i></a><span>Fractal.js</span></div>
         <div><a href="https://git-r3lab.uni.lu/Fractalis"><i class="material-icons">code</i></a><span>Repository</span></div>
         <div><a href="https://www.apache.org/licenses/LICENSE-2.0"><i class="material-icons">book</i></a><span>Apache 2.0</span></div>
+        <div><a href="mailto:sascha.herzinger@uni.lu"><i class="material-icons">mail</i></a><span>Contact</span></div>
     </div>
     <footer>
         <a href="http://lcsb.uni.lu"><img class="footer-logo" src="LCSB_UL_Logo.png"/></a>