add favicon

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>

static/safari-pinned-tab.svg

@@ -0,0 +1,16 @@
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 20010904//EN"
+ "http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd">
+<svg version="1.0" xmlns="http://www.w3.org/2000/svg"
+ width="83.000000pt" height="83.000000pt" viewBox="0 0 83.000000 83.000000"
+ preserveAspectRatio="xMidYMid meet">
+<metadata>
+Created by potrace 1.11, written by Peter Selinger 2001-2013
+</metadata>
+<g transform="translate(0.000000,83.000000) scale(0.100000,-0.100000)"
+fill="#000000" stroke="none">
+<path d="M107 689 l-108 -129 203 -269 c112 -149 205 -270 208 -271 3 0 43 48
+88 108 242 317 322 424 322 431 0 5 -47 65 -105 135 l-105 126 -198 -1 -197 0
+-108 -130z"/>
+</g>
+</svg>

static/site.webmanifest

@@ -0,0 +1,14 @@
+{
+    "name": "",
+    "short_name": "",
+    "icons": [
+        {
+            "src": "/android-chrome-72x72.png",
+            "sizes": "72x72",
+            "type": "image/png"
+        }
+    ],
+    "theme_color": "#ffffff",
+    "background_color": "#ffffff",
+    "display": "standalone"
+}