Introduce bashate linter

I am unclear if there is linting in this project. The bash looks pretty solid, and the work is pretty awesome. Nice job.

I would suggest linting - it may be of value.

Cheers,
-steve

Start by checking the repository's existing linting setup and Bash scripts, then determine where bashate would be configured. Done means the project's Bash is checked by bashate through a repeatable project workflow.

Written by the indexing model from the issue text.