ENVAR documentation is confusing

[nodesocket]

The Environment variables documentation is a bit confusing. For example:

DISABLE_LOGIN = 1

Does this signify by default login is disabled? That does not seem to be the case.

DEBUG = <debug value>

Console logging for specific areas of the application. Values include umami:auth, umami:clickhouse, umami:kafka, umami:middleware, and umami:prisma.

Can you show an example of setting DEBUG? Where is ClickHouse and Kafka coming from? I don't even see those as backend storage option. Can I specify multiple like umami:auth, umami:middleware, and umami:prisma?

DISABLE_BOT_CHECK = 1

By default bots are excluded from statistics. This disables checking for bots.

Again, does this signify bot checks are disabled by default? The help text above indicates by default bot checks are enabled? Confusing 😕

PRIVATE_MODE = 1

Disables all external network calls. Note, this will also disable all website icons since they come from duckduckgo.com.

Is private mode enabled by default?