Making this issue here to brainstorm the best way to handle this.

Here's what I'm currently thinking:

• Allow setting a "default" environment statically in shipit.initConfig.
  • Environment set in the CLI command would override.
  • This would allow for workflows where certain branches deploy to certain environments by default (e.g. master → production, development → development). The user could set the environment in shipit.initConfig to a function that parsed your current git branch and returned the matching environement. Of course, they could always override it by passing an environment in the CLI
• If no environment set in either CLI or shipit.initConfig, trigger an inquirer choices prompt.