Redis configuration by environment variables

[soren_1]

I'd like to configure Redis by using environment variables. Is that possible?

More specifically I'd like to do this configuration:
https://devdocs.magento.com/guides/v2.0/config-guide/redis/redis-pg-cache.html#config-redis-config
by environment variables:

https://devdocs.magento.com/guides/v2.2/config-guide/prod/config-reference-var-name.html

What would by the environment variable name of say

["cache"]["frontend"]["default"]["backend"]

or

["cache"]["frontend"]["default"]["backend_options"]["server"]

?