https://blog.golang.org/defer-panic-and-recover
https://hackernoon.com/correct-error-handling-is-hard-307ea72759c7

2019
https://blog.golang.org/go1.13-errors
    https://habr.com/ru/company/mailru/blog/473658/
https://medium.com/gett-engineering/error-handling-in-go-53b8a7112d04
    https://habr.com/ru/company/otus/blog/453806/
2018
https://habr.com/post/421259/
https://hackernoon.com/golang-handling-errors-gracefully-8e27f1db729f
    https://nuancesprog.ru/p/2601/
https://habr.com/post/425145/
https://habr.com/post/422419/