[Website]: Missing env provider fallbacks #2475
Description
Type of issue
None
What documentation page is affected
https://www.elastic.co/docs/reference/fleet/env-provider
What happened?
We should show: https://www.elastic.co/docs/reference/beats/filebeat/using-environ-vars the providers and how to deal with fallbacks and default values. here we have an example: https://github.com/elastic/elastic-agent/blob/main/deploy/kubernetes/elastic-agent-standalone/templates.d/container_logs.yml#L15 the fallback is different as it uses | pipe symbol instead of : colon.
We could basically link to this: https://www.elastic.co/docs/reference/fleet/dynamic-input-configuration#_alternative_variables_and_constants
Additional info
No response