added subpage for copyright information

content/copyright.md

@@ -0,0 +1,9 @@
+---
+title: Copyright
+#descriptions: empty description
+#summary: empty summary
+#weight: 98
+---
+# Copyright informations
+- The symbol next to external links, i.e. <svg style="height: 0.7em; width: 0.7em;" focusable="false" data-prefix="fas" data-icon="external-link-alt" class="svg-inline--fa fa-external-link-alt fa-w-16" role="img" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><title>external link</title><path fill="currentColor" d="M432,320H400a16,16,0,0,0-16,16V448H64V128H208a16,16,0,0,0,16-16V80a16,16,0,0,0-16-16H48A48,48,0,0,0,0,112V464a48,48,0,0,0,48,48H400a48,48,0,0,0,48-48V336A16,16,0,0,0,432,320ZM488,0h-128c-21.37,0-32.05,25.91-17,41l35.73,35.73L135,320.37a24,24,0,0,0,0,34L157.67,377a24,24,0,0,0,34,0L435.28,133.32,471,169c15,15,41,4.5,41-17V24A24,24,0,0,0,488,0Z"></path></svg> is taken from [Jayeless.net](https://www.jayeless.net/2021/08/hugo-mark-external-links.html) and is under [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/) License who based it on [FontAwesome](https://fontawesome.com/v5.15/icons/external-link-alt?style=solid) that [licenses its icons under CC BY 4.0](https://fontawesome.com/license/free)
+- If not stated otherwise, all content on this site is licensed under [CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0/)