What's changing

Improvements to Lumigator's day 1 installation story (settings).

• Remove use of .env file directly (.env.template not needed)
• VS Code terminal issue around default vars is now moot
• Updated docs
• Use .default.conf and optional user.conf for configuration of app
• Allow default settings and user supplied settings to be combined, preferring user settings

Closes #812

How to test it

Steps to test the changes:

Defaults:

make start-lumigator
# No user configuration found, default will be used: '.default.conf'
cat .default.conf | grep DEPLOYMENT_TYPE # should show 'local'
curl -s 'http://localhost:8000/api/v1/health/' | jq '.deployment_type' # should show 'local'
cat build/.env # Should show defaults
make stop-lumigator

Then add a setting via the user config override:

rm user.conf # Sanity check
echo DEPLOYMENT_TYPE=development > user.conf
make start-lumigator
# "Found user configuration: 'user.conf', overrides will be applied"
cat .default.conf | grep DEPLOYMENT_TYPE # should show 'local'
cat user.conf | grep DEPLOYMENT_TYPE # should show 'development'
curl -s 'http://localhost:8000/api/v1/health/' | jq '.deployment_type' # should show 'development'
cat build/.env # Should show aggregated settings
make stop-lumigator

Additional notes for reviewers

Anything you'd like to add to help the reviewer understand the changes you're proposing.

I already...

• Tested the changes in a working environment to ensure they work as expected
• Added some tests for any new functionality
• Updated the documentation (both comments in code and product documentation under /docs)
• Checked if a (backend) DB migration step was required and included it if required