install.json

{
  "$schema": "http://json.schemastore.org/install",
  "resources": {
    "body": [
      {
        "type": "style",
        "src": "./build/styles.css"
      },
      {
        "type": "script",
        "src": "./build/index.js"
      }
    ]
  },
  "dns": [
    {
      "type": "TXT",
      "content": "Managed TXT Record",
      "name": "Created by create-cloudflare-app",
      "ttl": 120
    }
  ],
  "preview": {
    "handlers": [
      {
        "options": ["_default"],
        "execute": "INSTALL_SCOPE.setOptions(INSTALL_OPTIONS)"
      }
    ]
  },
  "options": {
    "properties": {
      "location": {
        "title": "Message Location",
        "description": "Where should the message appear?",
        "order": 0,
        "type": "object",
        "format": "element",
        "default": {
          "selector": "body",
          "method": "prepend"
        }
      },
      "message": {
        "title": "Message",
        "description": "A short example message.",
        "type": "string",
        "format": "richtext",
        "order": 1,
        "default": "<h1>Welcome to Cloudflare Apps!</h1><p>Download this app every time you want to make a new project.</p><p>This app renders a message to the user's website and sets a TXT DNS record with a value of 'Hello DNS'."
      }
    }
  }
}