Just go to /plugins/system/docker/themes/default.php. There you can easily add new links or edit the existing ones or even delete unwanted links. At around line 195 you see blocks like this one:

<li>

                    <a href="<?php echo ESR::profile();?>">

                        <i class="fa fa-id-card-o"></i>

                        <span><?php echo JText::_('Mein Profil');?></span>

                    </a>

                </li>

Which you can easily edit to have links related to your website structure:

<li>

                    <a href="/INSERT/PATH/TO/EDIT-PROFILE">

                        <i class="fa fa-pencil"></i>

                        <span><?php echo JText::_('EDIT PROFILE');?></span>

                    </a>

                </li>

Just replace the bold ones with your own stuff. "fa-pencil" is the shortcode for the used FontAwesome icon. http://fontawesome.io/icons/ Here you will find all existing FontAwesome icons. To see the code just click the icon you want and replace the code with the existing one.

Make a copy on your local PC of that file afterwards because updating the plugin will overwrite your changes.

Thanks for your tipp Sabih but no offense, I am still thinking this should be a part off the Docker, hence this request.