{ "name":"CLACK", "short_name":"CLACK", "start_url":"./", "scope":"./", "display":"fullscreen", "background_color":"#3f83ff", "theme_color":"#3f83ff",
  "icons":[{"src":"icon-192.png","sizes":"192x192","type":"image/png"},{"src":"icon-512.png","sizes":"512x512","type":"image/png"}] }