Use BOX_ENV instead of NODE_ENV

Let NODE_ENV be used by node modules and always be set to production

Fixes #453

src/test/checkInstall

@@ -24,7 +24,7 @@ for script in "${scripts[@]}"; do
         echo "${script} does not have sudo access."
         echo "You have to add the lines below to /etc/sudoers.d/yellowtent."
         echo ""
-        echo "Defaults!${script} env_keep=\"HOME NODE_ENV\""
+        echo "Defaults!${script} env_keep=\"HOME BOX_ENV\""
         echo "${USER} ALL=(ALL) NOPASSWD: ${script}"
         echo ""
         exit 1