Add iconography and styling for various user agents

layouts/header.ejs

@@ -5,6 +5,18 @@
     <meta name="viewport" content="width=device-width, initial-scale=1">
     <meta name="color-scheme" id="meta-scheme" content="">
     <meta property="og:title" content="<%= locals.title %>">
+    <link rel="shortcut icon" type="image/svg+xml" href="/static/favicon.svg">
+    <link rel="icon" type="image/svg+xml" href="/static/favicon.svg">
+    <link rel="apple-touch-icon" type="image/svg+xml" href="/static/favicon.svg">
+    <link rel="apple-touch-icon-precomposed" type="image/svg+xml" href="/static/favicon.svg">
+    <link rel="apple-touch-icon" sizes="180x180" href="/static/apple-touch-icon.png">
+    <link rel="icon" type="image/png" sizes="32x32" href="/static/favicon-32x32.png">
+    <link rel="icon" type="image/png" sizes="192x192" href="/static/android-chrome-192x192.png">
+    <link rel="icon" type="image/png" sizes="16x16" href="/static/favicon-16x16.png">
+    <link rel="manifest" href="/static/site.webmanifest">
+    <link rel="mask-icon" href="/static/safari-pinned-tab.svg" color="#55bbad5">
+    <meta name="msapplication-TileColor" content="#da532c">
+    <meta name="msapplication-config" content="/static/browserconfig.xml">
     <script type="text/javascript">
       {
         // Populate the theme as early as possible to prevent a flash on load.

static/browserconfig.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<browserconfig>
+    <msapplication>
+        <tile>
+            <square150x150logo src="/mstile-150x150.png"/>
+            <TileColor>#da532c</TileColor>
+        </tile>
+    </msapplication>
+</browserconfig>