bug fix

[yrong]

1,fix the port confict when deploy gonet2/game service 2,import local package here instead

[xtaci]

port should be mapped from docker to the outside or a standalone IP in k8s, keep all services share a same inside port for etcd discovery

[yrong]

• chat/kafka本地引用就可以了吧，感觉这个chat和您gonet2项目的其它子模块(game,agent...)引用方式不太一致．
• no docker，搭建本地开发环境的时候chat服务和game服务服务端口冲突

[xtaci]

端口已经参数化了 https://github.com/xtaci/chat/blob/master/main.go#L31