message: point to correct index for build and dev
diff: "description": "Primer react components",
  "main": "src/Index.js",
  "scripts": {
  - "start": "x0 dev src/Index.js -op 8888",
  - "build": "x0 build src/Index.js --out-dir docs",
  + "start": "x0 dev examples/Index.js -op 8888",
  + "build": "x0 build examples/Index.js --out-dir docs",
  "test": "jest"
  },
  "repository": {
  