manifest.json

{
  "name": "Costello",
  "details":"With the Costello Power-Up enabled, you'll be able to open a card and set a cost. That cost will be displayed on the front of the card (costs of zero are in red) and a sum of the costs will be displayed in the top right corner of your board.\n\n* Add costs to cards\n* See a summary of those costs on your board\n* Costello costs nothing!\n* [Source available on Github](https://github.com/webrender/trello-costello)\n\n### Screenshot\n\n![Costello Demo GIF](https://info.trello.com/hubfs/Power-Ups/Costello/costello_demo.gif?t=1516965722234)",
  "icon": {
    "url": "./costello_logo.svg"
  },
  "author": "webrender",
  "capabilities": [
    "board-buttons",
    "callback",
    "card-badges",
    "card-buttons",
    "show-settings"
  ],
  "connectors": {
    "iframe": {
      "url": "./index.html"
    }
  }
}