## 내부 패키지 등록
    cmd or internal path로 등록
    ex) go mod init cmd/hello
    ex) go mod init internal/net
    ## work
	go work init
	go work use [path]
    ex) go work use ./cmd/hello
    ex) go work use ./internal/net- cmd/examples 참고
 - Docekrfile.example.swagger 참고
 
    ## in repository
    go install github.com/swaggo/swag/cmd/swag@latest
    ## swag error
    zsh: command not found: swag
    ## swag error solution
    export PATH=$(go env GOPATH)/bin:$PATH
    ## fmt (formatting)
    swag fmt
    ## init (init)
    swag init
    ## import 등록 
    
    import (
        ...
        _ "cmd/{application}/docs
    )