Start all scripts with `set -eu`

[devlinjunker]

Describe the Improvement:
Want to have added security in our bash scripts, so we should start them by setting some flags -e and -u

Steps:

1. Add set -eu to each bash script

Additional Context and Links:
https://cuddly-octo-palm-tree.com/posts/2021-01-24-bash-set-dash-u/

Testing:
It might, but that’s okay it will also help reduce bugs