Fix npm start and test commands

Signed-off-by: João Victor Tozatti Risso <jvtr12@inf.ufpr.br>

package.json

@@ -5,8 +5,8 @@
   "description": "Simulador custo aluno-qualidade",
   "private": true,
   "scripts": {
-    "start": "forever start server.js || node server.js",
-    "test": "mocha"
+    "start": "cd build && forever start server.js || node server.js",
+    "test": "cd build && mocha"
   },
   "dependencies": {
     "apicache": "0.0.14",