Before production starts update

Updates node version and most of packages.

Changelog

Bump node version from 12 to 16
Bump production image alpine version to 3.14
maligun-js is replaced with mailgun.js as former package is deprecated
winston-mailgun is removed and replaced with new transport in repository
Small packages are removed and replaced with native nodejs implementations
Replace http-auth with express-basic-auth, latter is enough for our usecase and API of http-auth has been broken