Use relative paths.

energy-viz/index.html

@@ -11,10 +11,10 @@
     <meta property="og:image:width" content="1005" />
     <meta property="og:image:height" content="472" />
     <meta property="og:image:alt" content="A heatmap of wind generation in the US" />
-    <link rel="apple-touch-icon" sizes="180x180" href="/energy-viz/apple-touch-icon.png">
-    <link rel="icon" type="image/png" sizes="32x32" href="/energy-viz/favicon-32x32.png">
-    <link rel="icon" type="image/png" sizes="16x16" href="/energy-viz/favicon-16x16.png">
-    <link rel="manifest" href="/energy-viz/site.webmanifest">
+    <link rel="apple-touch-icon" sizes="180x180" href="./apple-touch-icon.png">
+    <link rel="icon" type="image/png" sizes="32x32" href="./favicon-32x32.png">
+    <link rel="icon" type="image/png" sizes="16x16" href="./favicon-16x16.png">
+    <link rel="manifest" href="./site.webmanifest">
     <script src='https://api.mapbox.com/mapbox-gl-js/v0.53.0/mapbox-gl.js'></script>
     <link href='https://api.mapbox.com/mapbox-gl-js/v0.53.0/mapbox-gl.css' rel='stylesheet' />
     <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>