Refactor `altdocker` script
Refactor `altdocker` script

- Use better parameter names
- Use better defaults for filenames
- Split out Arch- and benizi-specific params
- Print a message for exporting the socket

benizi/dotfiles,benizi/dotfiles,benizi/dotfiles,benizi/dotfiles,benizi/dotfiles,benizi/dotfiles,benizi/dotfiles,benizi/dotfiles