standardnotes-app-web/packages/web-server/public/components/org.standardnotes.standard-sheets/dist/ext.json

{
    "identifier": "org.yourdomain.spreadsheet-pro",
    "name": "Secure Spreadsheets Pro",
    "content_type": "SN|Component",
    "area": "editor-editor",
    "version": "1.0.0",
    "url": "http://localhost:8080"
}