docs: adding ndnSIM best practices section

Change-Id: I57afb3386cce700251bdfd6b53f00b22eafdf1bc
diff --git a/docs/source/_templates/indexcontent.html b/docs/source/_templates/indexcontent.html
index e83a04b..4420c36 100644
--- a/docs/source/_templates/indexcontent.html
+++ b/docs/source/_templates/indexcontent.html
@@ -23,6 +23,8 @@
             <span class="linkdescr">frequently asked questions (with answers!)</span></p>
           <p class="biglink"><a class="biglink" href="{{ pathto("examples") }}">Simulation examples</a><br/>
             <span class="linkdescr">basic tutorial examples</span></p>
+          <p class="biglink"><a class="biglink" href="{{ pathto("best-practices") }}">Best practises</a><br/>
+            <span class="linkdescr">best practises on using ndnSIM</span></p>
         </div>
       </td>
       <td width="50%" valign="top">