goroutines

cd /ideaProjectsGitHub/playground/docs/languages/05-go/04-generics/challenges/01-book-example

go mod init docs/languages/05-go/04-generics/challenges/01-book-example

go build ./...

go run ./cmd/cli/main.go

go build -o main main.go
go run main.go
go build ./...
go test ./...
go mod tidy