chore: define node 6 as required version

Author: maxceem

.nvmrc

@@ -0,0 +1 @@
+6.17.1

README.md

@@ -6,8 +6,8 @@ Internal application used to administer specific support tasks related to the To
 
 ## Software Requirements
 
-- node.js v6+
-- npm v3+
+- node.js v6 (not later)
+- npm v3
 - Google Chrome browser version >= 55.0.2883.0
 
 ## Installation

package.json

@@ -82,7 +82,7 @@
     "wiredep": "~4.0.0"
   },
   "engines": {
-    "node": ">=0.10.0"
+    "node": "6"
   },
   "scripts": {
     "clean": "gulp clean",