templates/blogindex: add a blogroll

Closes #9

templates/blogindex.html

@@ -9,6 +9,8 @@
 {{ end }}
 
 {{ define "content" }}
+<h1>Blogposts</h1>
+
 <div class="grid">
     {{ range . }}
     <div class="card cell -4of12 blogpost-card">
@@ -19,4 +21,14 @@
     </div>
     {{ end }}
 </div>
+
+<h2>Other Blogs I Find Interesting</h2>
+
+<ul>
+    <li><a href="https://write.as/excerpts/">Excerpts</a></li>
+    <li><a href="https://heartmender.writeas.com/">Heartmender</a></li>
+    <li><a href="https://celestialboon.github.io/">CelestialBoon</a></li>
+    <li><a href="https://slatestarcodex.com/">Star Slate Codex</a></li>
+    <li><a href="https://shamanic.vision/">Shamanic Vision</a></li>
+</ul>
 {{ end }}