{ "name":"PERA PMS","short_name":"PERA PMS","start_url":"/","display":"standalone",
  "background_color":"#ffffff","theme_color":"#1f3a5f",
  "icons":[
    {"src":"/pera-192.png","sizes":"192x192","type":"image/png","purpose":"any"},
    {"src":"/pera-512.png","sizes":"512x512","type":"image/png","purpose":"any"},
    {"src":"/pera-mask.png","sizes":"512x512","type":"image/png","purpose":"maskable"}
  ] }