add gpl note

website/dist/about/index.html

@@ -23,6 +23,17 @@
                 Additionally, since it is basically a "conventional" website, you can use your own domain and customize everything to your liking. As the whole project is open source, you 
                 may as well add or remove some features, if you know how to do it. 
             </p>
+            <h3 id="gpl">License</h3>
+            <p>This project is licensed under the GNU General Public License Version 3 or later. <br>
+                This program is free software: you can redistribute it and/or modify
+                it under the terms of the GNU General Public License as published by
+                the Free Software Foundation, either version 3 of the License, or
+                (at your option) any later version.
+            
+                This program is distributed in the hope that it will be useful,
+                but WITHOUT ANY WARRANTY; without even the implied warranty of
+                MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+                GNU General Public License for more details.</p>
         </div>
         <div id="footer"></div>
         <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.6.1/jquery.min.js"></script>