Remove no-db mode configuration

[TimCsaky]

Remove no-db mode

ticket: https://apps.nrs.gov.bc.ca/int/jira/browse/SHOWCASE-3241

removed no-db feature toggle
removed conditional logic
updated app.js startup checks
updated documentation
updated unit tests

Description

Types of changes

Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• I have read the CONTRIBUTING doc
• I have checked that unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

Further comments

[github-actions]

Coverage Report

Totals
Statements:	53.55% ( 1961 / 3662 )
Methods:	41.4% ( 219 / 529 )
Lines:	60.23% ( 1236 / 2052 )
Branches:	46.81% ( 506 / 1081 )

[codeclimate]

Code Climate has analyzed commit d577dc2 and detected 8 issues on this pull request.

Here's the issue category breakdown:

Category	Count
Duplication	8

The test coverage on the diff in this pull request is 29.8% (50% is the threshold).

This pull request will bring the total coverage in the repository to 60.2% (-0.3% change).

View more on Code Climate.

[jujaga]

From what I could tell things seem to be working across most endpoints. We'll want to simply and remove unneeded IIFEs as well as consider putting more enforcement logic for when db.* isn't defined or partially missing.