#439 fix favicons on subsubpage

website/static/header.html

@@ -4,14 +4,14 @@
 />
 
 <!-- https://realfavicongenerator.net/ -->
-<link rel="apple-touch-icon" sizes="180x180" href="favicon/apple-touch-icon.png" />
-<link rel="icon" type="image/png" sizes="32x32" href="favicon/favicon-32x32.png" />
-<link rel="icon" type="image/png" sizes="16x16" href="favicon/favicon-16x16.png" />
-<link rel="manifest" href="favicon/site.webmanifest" />
-<link rel="mask-icon" href="favicon/safari-pinned-tab.svg" color="#5898d4" />
-<link rel="shortcut icon" href="favicon/favicon.ico" />
+<link rel="apple-touch-icon" sizes="180x180" href="/favicon/apple-touch-icon.png" />
+<link rel="icon" type="image/png" sizes="32x32" href="/favicon/favicon-32x32.png" />
+<link rel="icon" type="image/png" sizes="16x16" href="/favicon/favicon-16x16.png" />
+<link rel="manifest" href="/favicon/site.webmanifest" />
+<link rel="mask-icon" href="/favicon/safari-pinned-tab.svg" color="#5898d4" />
+<link rel="shortcut icon" href="/favicon/favicon.ico" />
 <meta name="msapplication-TileColor" content="#2b5797" />
-<meta name="msapplication-config" content="favicon/browserconfig.xml" />
+<meta name="msapplication-config" content="/favicon/browserconfig.xml" />
 <meta name="theme-color" content="#5898d4" />
 
 <script>