使用zap封装的log模块，可同时输出控制台和日志文件
目前支持两种编码模式, console 和 json; 可在配置文件中设置 Encoder 修改;
[2022-06-21 18:39:40] [info] [main.main:36] Start Web Server
[2022-06-21 18:42:00] [info] [fly/example/api/example/controller.Hello:21] [X-Request-Id:62b659cd-373a-49e2-82dc-e63cac629a84] hello, 司马老贼
[2022-06-21 18:42:00] [info] [fly/pkg/httpcode.(*Req).Code:50] [X-Request-Id:62b659cd-373a-49e2-82dc-e63cac629a84] api: /v1/hello, run: 330.125µs, param: {"name":"司马老贼"}, code: 200
{"level":"info","ts":"2022-06-21 18:43:09","caller":"main.main:36","msg":"Start Web Server "}
{"level":"info","ts":"2022-06-21 18:43:13","caller":"fly/example/api/example/controller.Hello:21","msg":"hello, 司马老贼","X-Request-Id":"2e33e08f-4fe9-4424-aeb5-c26151559143"}
{"level":"info","ts":"2022-06-21 18:43:13","caller":"fly/pkg/httpcode.(*Req).Code:50","msg":"api: /v1/hello, run: 305.458µs, param: {\"name\":\"司马老贼\"}, code: 200","X-Request-Id":"2e33e08f-4fe9-4424-aeb5-c26151559143"}
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