refactor: replace exit chan with context

[ColinChamber]

I saw your TODO mark. Would it be better to use context? @childe

[childe]

Thanks. could you help format the code and push a new commit ? I will squash and merge them

[ColinChamber]

$ golangci-lint run gohangout.go
gohangout.go:161:23: Error return value of `http.ListenAndServe` is not checked (errcheck)
                        http.ListenAndServe(options.prometheus, nil)
                                           ^
gohangout.go:167:23: Error return value of `http.ListenAndServe` is not checked (errcheck)
                        http.ListenAndServe(options.pprofAddr, nil)

$ golangci-lint run input/input_box.go 

It has no issues when checking with golangci-lint. Could you tell me how to find the line that needs to be formatted?

[childe]

$ golangci-lint run gohangout.go
gohangout.go:161:23: Error return value of `http.ListenAndServe` is not checked (errcheck)
                        http.ListenAndServe(options.prometheus, nil)
                                           ^
gohangout.go:167:23: Error return value of `http.ListenAndServe` is not checked (errcheck)
                        http.ListenAndServe(options.pprofAddr, nil)

$ golangci-lint run input/input_box.go 

It has no issues when checking with golangci-lint. Could you tell me how to find the line that needs to be formatted?

gofmt --help