message: build base CSS statically post-dist
diff: "start": "next start",
  "predist": "rm -rf dist",
  "dist": "NODE_ENV=production rollup -c",
  + "postdist": "primer-module-build src/primer-react.scss --outputDir dist/css",
  "prepack": "script/npm-pack-check",
  "prepublishOnly": "npm run dist",
  "lint": "eslint src pages",
  