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Add _FILE Environment Variable Documentation

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Jonas Thelemann 2019-03-27 10:50:03 +01:00 committed by Traefiker Bot
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docs/content/https-tls/acme.md
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@ -110,7 +110,10 @@ Use the `DNS-01` challenge to generate and renew ACME certificates by provisioni
Here is a list of supported `providers`, that can automate the DNS verification,
along with the required environment variables and their [wildcard & root domain support](#wildcard-domains).
Do not hesitate to complete it.
Do not hesitate to complete it.
Every lego environment variable can be overridden by their respective `_FILE` counterpart, which should have a filepath to a file that contains the secret as its value.
For example, `CF_API_EMAIL_FILE=/run/secrets/traefik_cf-api-email` could be used to provide a Cloudflare API email address as a Docker secret named `traefik_cf-api-email`.
| Provider Name | Provider Code | Environment Variables | Wildcard & Root Domain Support |
|-------------------------------------------------------------|----------------|---------------------------------------------------------------------------------------------------------------------------------------------|--------------------------------|