[default theme] Add the ability to pass a custom css file & add custom links

src/types/Config.ts

@@ -4,4 +4,5 @@ export interface Branding {
 export default interface Config {
   branding: Branding;
   theme: string;
+  themeOpts: any;
 }

src/views/themes/default/header.ejs

@@ -1,9 +1,17 @@
+<title><%= config.branding.title %></title>
+<link rel="stylesheet" href="/static/custom.css">
 <div id="header-content">
   <h1><%= config.branding.title %></h1>
   <hr>
   <div id="link-container">
+    <% if(config.themeOpts.links) { %>
+      <% for(const link of config.themeOpts.links) { %>
+        <a href="<%= link.url %>"><%= link.title %></a>
+      <% } %>
+    <% } else { %>
       <a href="/">home</a>
       <a href="/post/about.md">about</a>
       <a href="/post/contact.md">contact</a>
+    <% } %>
   </div>
 </div>