Cypress + CI using package.json scripts

package.json

{
  "scripts": {
    "start": "node-sass src/style/main.scss --source-map-embed > public/style.css && concurrently --kill-others \"npm run serve\" \"npm run sass-watch\"",
    "serve": "env $(cat .env | xargs) VERSION=`cat package.json | json version` budo src/index.js:bundle.js --pushstate --dir=public --live -- -t babelify -g aliasify -t [ envify --NODE_ENV development ] -dv",
    "cypress-ci": "start-server-and-test start http://localhost:9966 cy:run",
    "cy:run": "cypress run --config baseUrl=\"http://localhost:9966\""
  },
  "devDependencies": {
    "start-server-and-test": "^1.7.11",
  }
}

The start-server-and-test command takes an npm script as the first arg, which is 'start' here. This command should start our server. Once the URL, the next arg is available, then it will run the last arg, cy:run.

start in this case starts budo, it is the same command we use as a local dev server. start-server-and-test handles creating and terminating our server and test processes in the right order, and exiting with the right code.