traefik/docs/content/reference/static-configuration/env.md

title	description
Traefik Environment Variables Documentation	Reference the environment variables for static configuration in Traefik Proxy. Read the technical documentation.

Static Configuration: Environment variables

!!! warning "Environment Variable Casing"

Traefik normalizes the environment variable key-value pairs by lowercasing them.
This means that when you interpolate a string in an environment variable's name,
that string will be treated as lowercase, regardless of its original casing.

For example, assuming you have set environment variables as follows:

```bash
    export TRAEFIK_ENTRYPOINTS_WEB=true
    export TRAEFIK_ENTRYPOINTS_WEB_ADDRESS=:80

    export TRAEFIK_CERTIFICATESRESOLVERS_myResolver=true
    export TRAEFIK_CERTIFICATESRESOLVERS_myResolver_ACME_CASERVER=....
```

Although the Entrypoint is named `WEB` and the Certificate Resolver is named `myResolver`, 
they have to be referenced respectively as `web`, and `myresolver` in the configuration.

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