diff --git a/README.md b/README.md
index 971207f..7d40e94 100644
--- a/README.md
+++ b/README.md
@@ -2,15 +2,20 @@
 
 Configuration for traefik 2 and authelia
 
+## Environment variables
 
-### Authelia preprocessor
-The authelia configuration contains some sensitive values, but authelia cannot read them from env variables like traefic can.
-Instead, a special service - `authelia-config` runs before authelia start, and preprocesses the configuration file.
+This setup uses two global environment variables: `PRIVATE_DOMAIN` and `PUBLIC_DOMAIN`. Those are two registered domain names I use for public and private services.
 
-- Local file `./authelia/configuration.yaml` is mapped to `/data/input` in `authelia-config`
-- Volume `authelia-config` is mapped to `/data/output` in `authelia-config`
-- `authelia-config` runs `gomplate` on `/data/input` and saves to `data/output/configuration.yaml`
-- Volume `authelia-config` is mapped to `/etc/authelia` in `authelia`, where it reads its configuration
+There is also an `.env` file which defines a few more variables:
+```
+AUTHELIA_JWT_SECRET=...
+AUTHELIA_SESSION_SECRET=...
+AUTHELIA_SESSION_DOMAIN=...
+AUTHELIA_TOTP_ISSUER=...
+TRAEFIK_CERTIFICATERESOLVERS_LE_ACME_EMAIL=...
+```
+
+The value of those depend on your setup and can be found in the Traefik and Authelia documentation.
 
 ## Lessons learned