How to use:
$ go get github.com/iamken1204/example-multi-servers
$ cd $GOPATH/src/github.com/iamken1204/example-multi-servers
$ go run main.go
visit
- localhost:8001
- localhost:8001/foo
- localhost:8001/bar
- localhost:8002
- localhost:8002/foo
- localhost:8002/bar