{
"name":"OES Application System",
"short_name":"OES",
"start_url":".",
"display":"standalone",
"background_color":"#fff",
"description":"OES: A Online Education System",
"icons":[
  {
    "src":"logo.png",
    "sizes": "88x88",
    "type": "image/png"
   }, 
 {
    "src":"logo.png",
    "sizes": "88x88",
    "type": "image/png"
}
]
}