Remove code duplication for landing page

layouts/index.html

@@ -1,17 +1,3 @@
 {{ define "main" }}
-<div
-    style="text-align: center; display: flex; justify-content: center; flex-direction: column; align-items: center; height: 50vh;">
-    <img src="/images/portrait.jpeg" alt="Picture of Ville Lindholm"
-        style="border-radius: 50%; width: 150px; height: 150px;" />
-    <hgroup>
-        <h1>Ville Lindholm</h1>
-        <p>Full-stack Software engineer</p>
-        <p>Helsinki, Finland</p>
-    </hgroup>
-    <div style="display: flex;">
-        <a href="https://github.com/vlindhol"><i class='bx bxl-github'></i></a>
-        <a href="https://x.com/lindholm_dev"><i class='bx bxl-twitter'></i></a>
-        <a href="https://www.linkedin.com/in/villelindholm/"><i class='bx bxl-linkedin-square'></i></a>
-    </div>
-</div>
+{{ .Content }}
 {{ end }}