App icons for iOS, Windows

public/images/app-icons/browserconfig.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<browserconfig>
+  <msapplication>
+    <tile>
+      <square70x70logo src="public/images/app-icons/mstile-70x70.png"/>
+      <square150x150logo src="public/images/app-icons/mstile-150x150.png"/>
+      <square310x310logo src="public/images/app-icons/mstile-310x310.png"/>
+      <wide310x150logo src="public/images/app-icons/mstile-310x150.png"/>
+      <TileColor>#2b5797</TileColor>
+    </tile>
+  </msapplication>
+</browserconfig>

public/images/app-icons/manifest.json

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+{
+	"name": "\u221e\u00b2",
+	"icons": [
+		{
+			"src": "public\/images\/app-icons\/android-chrome-36x36.png",
+			"sizes": "36x36",
+			"type": "image\/png",
+			"density": "0.75"
+		},
+		{
+			"src": "public\/images\/app-icons\/android-chrome-48x48.png",
+			"sizes": "48x48",
+			"type": "image\/png",
+			"density": "1.0"
+		},
+		{
+			"src": "public\/images\/app-icons\/android-chrome-72x72.png",
+			"sizes": "72x72",
+			"type": "image\/png",
+			"density": "1.5"
+		},
+		{
+			"src": "public\/images\/app-icons\/android-chrome-96x96.png",
+			"sizes": "96x96",
+			"type": "image\/png",
+			"density": "2.0"
+		},
+		{
+			"src": "public\/images\/app-icons\/android-chrome-144x144.png",
+			"sizes": "144x144",
+			"type": "image\/png",
+			"density": "3.0"
+		},
+		{
+			"src": "public\/images\/app-icons\/android-chrome-192x192.png",
+			"sizes": "192x192",
+			"type": "image\/png",
+			"density": "4.0"
+		}
+	]
+}