Added a link to the Debian/Ubuntu packages

Author: egonw

src/index.html

@@ -258,6 +258,10 @@ <h2 id="download" class="text-center text-primary">Download</h2>
             <p class="sub-paragraph">
               To include the all library modules in your project add cdk-bundle to your pom.xml. Once familiar with the library it's good practise to only include the modules your project needs (e.g. cdk-smiles).</p>
             </p>
+            <p class="sub-paragraph">
+              Also check out the <a target="_blank" href="https://packages.debian.org/libcdk-java">Debian GNU/Linux</a> and
+              <a target="_blank" href="https://packages.ubuntu.com/libcdk-java">Ubuntu</a> packages.
+            </p>
           </div>
         </div>
       </div>