message: Include the /extension-activation in the exported site.
diff: "build": "run-s build:css build:sapper",
  "build:css": "NODE_ENV=production postcss src/assets/global.pcss -o static/global.css",
  "build:sapper": "sapper build --ext '.md .svelte'",
  - "build:export": "sapper export --ext '.md .svelte'",
  + "build:export": "sapper export --ext '.md .svelte' --entry '/ /extension-activation'",
  "export": "run-s clean build:css build:export",
  "start": "node __sapper__/build",
  "serve": "serve ___sapper__/export",
  