- 1 -- error when executing command inside container
- 29 -- can't calc hash, need container rebuild
- 121 -- error when launching internal subcommand
- 122 -- can't parse arguments, trying to run vagga as root
- 124 -- error when executing wrapper's subcommand
- 126 -- can't read or parse config, vagga version mismatch, can't stat config directory
- 127 -- unknown command