Add licensing stuff

(also makes the tool work with librejs)

index.html

@@ -5,6 +5,7 @@
         <meta charset="UTF-8">
         <meta name="viewport" content="width=device-width, initial-scale=1">
         <script>
+            // @license http://www.wtfpl.net/txt/copying/ WTFPL
             function infohashToBase64(infohash) {
                 // Converts an hex infohash into base64.
 
@@ -86,6 +87,7 @@
                     document.getElementById("decodeResult").innerText = base64ToInfohash(urlParams.get("base64value"))
                 }
             });
+            // @license-end
         </script>
         <style>
             body {
@@ -200,6 +202,11 @@
                     You can check the source code by downloading the page (everything is stored in a single html file),
                     by going to your browser's devtools or on <a href="https://codeberg.org/magmaus3/infohash2base64">Codeberg</a>.
                 </p>
+                <h3>License</h3>
+                <p>Copyright © 2023 magmaus3 &lt;magmaus3@disroot.org&gt;</p>
+                <p>This work is free. You can redistribute it and/or modify it under the
+                terms of the Do What The Fuck You Want To Public License, Version 2,
+                as published by Sam Hocevar. See http://www.wtfpl.net/ for more details.</p>
             </div>
         </main>
     </body>