Add json output of mcrcon from index of vouchers

app/controllers/vouchers_controller.rb

@@ -6,9 +6,8 @@ class VouchersController < ApplicationController
   def index
     @vouchers = Voucher.all
     whitelist = `mcrcon -H mine.vereto.net -p #{ENV["MC_RCON_PASS"]} 'whitelist list' | sed 's/There are*.*whitelisted players: //g'`.split(", ")
-    @vouchers.zip(whitelist)
 
-    render json: @vouchers
+    render json: { :vouchers => @vouchers, :whitelist => whitelist }.to_json
   end
 
   # GET /vouchers/1