bug: fix invalid logging method for api, default to none

[friedbutter]

There is an error in the generated api.json.

"db" is not a valid option in validLogging in api/main.go:102

var validLogging = map[string]bool{
	settings.LoggingNone: true,
}

This was the error I got:

~/g/osctrl ❯❯❯ docker logs -f 0593dd8239167c3cc113779241b4cfc59896b9dbb1e19a0d603ffdf5ce926459
Postgres is up - Starting osctrl-api
main.go:109: Loading config/api.json
main.go:153: Error loading config/api.json - Invalid logging method: 'db'
Postgres is up - Starting osctrl-api
main.go:109: Loading config/api.json
main.go:153: Error loading config/api.json - Invalid logging method: 'db'

Nit: adding method in error strings to help with debugging.

[javuto]

Nice catch, thanks for the PR! 🙌