Improve the index

Author: williamdes

.github/api-docs/index.html

@@ -54,8 +54,18 @@ <h1 class="display-4">Doctum</h1>
                         <br>
                     </div>
                 </div>
+                <div class="card">
+                    <div class="card-body text-center">
+                        <a href="https://doctum.long-term.support/api-docs/phpunit/">PHPUnit tool</a>
+                        <br>
+                    </div>
+                </div>
                 <div class="col-1">&nbsp;</div>
             </div>
+            <div class="mt-4 text-center">
+                Missing your project ?<br>
+                Add it on GitHub <a target="_blank" href="https://github.com/code-lts/doctum/tree/main/.github/api-docs">here</a>
+            </div>
         </div>
     </main>
 </body>