update homebrew formula

migrate to codefresh.io for CI/CD; add homebrew formula

remove coverall report

adopt dobi for local and on-cloud build

do not fail build if COVERALLS_TOKEN is not defined: just print WARNING

fix staticly linked cross compilation

 command - limit egress traffic for specified containers

fix CircleCI build; set GH release status to pre-release

fix and speedup build; clean up pumba image

fix gosu architecture detection