Manifest PWA
<head>
...
<link rel="manifest" href="/manifest.json">
<!-- Safari -->
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black">
<meta name="apple-mobile-web-app-title" content="PWAGram">
<link rel="apple-touch-icon" href="/src/images/icons/apple-icon-57x57.png" sizes="57x57">
<link rel="apple-touch-icon" href="/src/images/icons/apple-icon-60x60.png" sizes="60x60">
<link rel="apple-touch-icon" href="/src/images/icons/apple-icon-72x72.png" sizes="72x72">
<link rel="apple-touch-icon" href="/src/images/icons/apple-icon-76x76.png" sizes="76x76">
<link rel="apple-touch-icon" href="/src/images/icons/apple-icon-114x114.png" sizes="114x114">
<link rel="apple-touch-icon" href="/src/images/icons/apple-icon-120x120.png" sizes="120x120">
<link rel="apple-touch-icon" href="/src/images/icons/apple-icon-144x144.png" sizes="144x144">
<link rel="apple-touch-icon" href="/src/images/icons/apple-icon-152x152.png" sizes="152x152">
<link rel="apple-touch-icon" href="/src/images/icons/apple-icon-180x180.png" sizes="180x180">
<!-- IE -->
<meta name="msapplication-TileImage" content="/src/images/icons/app-icon-144x144.png">
<meta name="msapplication-TileColor" content="#fff">
<meta name="theme-color" content="#3f51b5">
</head>
{
"name": "Instagram as Progressive Web App",
"short_name": "PWAGram",
"icons": [
{
"src": "/src/images/icons/app-icon-48x48.png",
"type": "image/png",
"sizes": "48x48"
},
{
"src": "/src/images/icons/app-icon-96x96.png",
"type": "image/png",
"sizes": "96x96"
},
{
"src": "/src/images/icons/app-icon-144x144.png",
"type": "image/png",
"sizes": "144x144"
},
{
"src": "/src/images/icons/app-icon-192x192.png",
"type": "image/png",
"sizes": "192x192"
},
{
"src": "/src/images/icons/app-icon-256x256.png",
"type": "image/png",
"sizes": "256x256"
},
{
"src": "/src/images/icons/app-icon-384x384.png",
"type": "image/png",
"sizes": "384x384"
},
{
"src": "/src/images/icons/app-icon-512x512.png",
"type": "image/png",
"sizes": "512x512"
}
],
"start_url": "/index.html",
"scope": ".",
"display": "standalone",
"orientation": "portrait-primary",
"background_color": "#fff",
"theme_color": "#3f51b5",
"description": "A simple Instagram Clone, implementing a lot of PWA love.",
"dir": "ltr",
"lang": "en-US"
}