Add shellcheck and fixup warnings

[stuartleeks]

Purpose

Add shellcheck extension and fix up warnings. This was surfaced due to an issue running deploy.sh when the path to the cloned repo included a space.

Does this introduce a breaking change?

[ ] Yes
[x] No

Pull Request Type

What kind of change does this Pull Request introduce?

[x] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Documentation content changes
[ ] Other... Please describe:

How to Test

• Get the code (clone to a path with a space)

git clone [repo-address]
cd [repo-name]

• Test the code

  ./scripts/deploy.sh

What to Check

Verify that the following are valid

• ...