feat: add GitHub link

src/pages/index.astro

@@ -2,6 +2,7 @@
 import { Image } from "astro:assets";
 import ExternalLink from "../components/external-link.astro";
 import InlineSvg from "../components/inline-svg.astro";
+import GitHubLogo from "../images/GitHub.svg";
 import KeyoxideLogo from "../images/Keyoxide.svg";
 import MatrixLogo from "../images/Matrix-logo.svg";
 import portrait from "../images/portrait.jpg";
@@ -47,6 +48,16 @@ import "../styles/global.css";
                 <span>@kmoschcau:matrix.org</span>
               </ExternalLink>
             </li>
+            <li>
+              <ExternalLink
+                cssClass="link-github"
+                href="https://github.com/kmoschcau/"
+                title="Mein GitHub-Konto"
+              >
+                <InlineSvg SvgComponent={GitHubLogo} slot="logo" />
+                <span>kmoschcau</span>
+              </ExternalLink>
+            </li>
             <li>
               <ExternalLink
                 cssClass="link-keyoxide"