add missing dotenv package

Author: NathanielRN

package.json

@@ -5,6 +5,7 @@
   "dependencies": {
     "express": "3.3.4",
     "jade": "1.1.5",
-    "mongodb": "^2.2.25"
+    "mongodb": "^2.2.25",
+    "dotenv": "*"
   }
 }