Knollfear/live db tests

[knollfear]

resolves #3451

Description-
This connects the unit tests to a db during execution.

This pull request changes...

• unit tests can be run inside docker with the script "unit-test.sh" in the api directory
• unit tests can be run locally (using docker as the DB) as normal as long as the db is running and configured
• local DB can be configured by running "setup-test-db.sh" and following the instructions

This pull request also touches…

• none, this is test code only

This pull request was tested in the follow ways…

• unit tests complete and do not hang

Steps to manually verify this change...

1. run unit-test.sh
2. edit db/knex.test.js to include the test
3. run unit-test.sh again
4. execute "setup-test-db.sh" and follow the instructions
5. run npm run test
6. stop the db container
7. run npm run test and it should finish, but fail
8. restart the db and it will work again

Wiki was updated as well https://github.com/CMSgov/eAPD/wiki/Development-accessibility,-testing,-and-linting

This pull request is ready to review when...

• Automated tests are updated (and all tests are passing)
• The change has been documented
• Associated OpenAPI documentation has been updated
• Changelog is updated as appropriate
• The experience passes a basic manual accessibility audit (keyboard nav, screenreader, text scaling) OR an exemption is documented

This pull request can be merged when…

• Code has been reviewed by someone other than the original author
• QA has verified the accessibility and functionality related to the change
• Design has approved the experience
• Product has approved the experience

[codecov-commenter]

Codecov Report

Merging #3452 (255752e) into development (26b43dd) will increase coverage by 0.26%.
The diff coverage is n/a.

@@               Coverage Diff               @@
##           development    #3452      +/-   ##
===============================================
+ Coverage        88.53%   88.79%   +0.26%     
===============================================
  Files              284      284              
  Lines             5616     5616              
  Branches          1073     1073              
===============================================
+ Hits              4972     4987      +15     
+ Misses             591      576      -15     
  Partials            53       53              

Impacted Files	Coverage Δ
api/middleware/errorHandler.js	80.95% <0.00%> (-9.53%)	⬇️
api/files/local.js	100.00% <0.00%> (+80.95%)	⬆️

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[cms-eapd-bot]

This deploy was cleaned up.

[cthulhuplus]

LGTM, ran locally and Knoll explained my comment.