Fixed PWA meta field (#30)

Author: dusanradovanovic

public/index.html

@@ -6,7 +6,7 @@
 
     <meta name="apple-mobile-web-app-capable" content="yes">
     <meta name="apple-mobile-web-app-status-bar-style" content="default">
-    <meta name="description" content="A sample weather app">
+    <meta name="description" content="Elastic Path&trade; Storefront Reference Application">
     <meta name="theme-color" content="#2F3BA2" />
 
     <link rel="apple-touch-icon" href="/images/icons/icon-152x152.png">