fix(config): make configPath correct for ip option

refs #216
- server.ip should be server.host

Author: acburdine

lib/commands/config/advanced.js

@@ -17,7 +17,7 @@ const BASE_PORT = '2368';
 module.exports = {
     ip: {
         description: 'IP ghost should listen on',
-        configPath: 'server.ip',
+        configPath: 'server.host',
         type: 'string'
     },
     url: {