No need to build multiple times

package.json

@@ -12,7 +12,7 @@
   "scripts": {
     "start": "node loader.js",
     "lint": "eslint --cache .",
-    "pretest": "npm run lint && node app --build",
+    "pretest": "npm run lint",
     "test": "istanbul cover node_modules/mocha/bin/_mocha -- -R dot",
     "coveralls": "istanbul cover _mocha --report lcovonly -- -R dot && cat ./coverage/lcov.info | ./node_modules/coveralls/bin/coveralls.js && rm -rf ./coverage"
   },