Keycloak OAuth redirect url combines CHAINTLIT_URL and CHAINLIT_ROOT_PATH

[mykemd]

Describe the bug
When Chainlit application is configured behind proxy with custom CHAINLIT_URL and CHAINLIT_ROOT_PATH env environment variables redirect_url parameter for the keycloak authentication has double the root path

To Reproduce
Steps to reproduce the behavior:

1. configure application to run behind proxy on https://mydomain.com/chainlit-ui path: CHAINLIT_URL=https://mydomain.com/chainlit-ui. CHAINLIT_ROOT_PATH=/chainlit-ui
2. Add keycloak OAUTH parameters
3. Run the App and Click on Continue With Keycloak
4. See network calls in Dev tools - redirect_url parameter for keycloak will double root path https://keycloakbase.com/realms/keycloak_realm/protocol/openid-connect/auth?client_id=keycloal_client_id&redirect_uri=https%3A%2F%2Fmydomain.com%2Fchainlit-ui%2Fchainlit-ui%2Fauth%2Foauth%2Fkeycloak%2Fcallback

Expected behavior
CHAINLIT_ROOT_PATH should not be added to the redirect url

Desktop (please complete the following information):

• Browser any

[mykemd]

For now we forked the project and modified this method

def get_user_facing_url(url: URL):
    """
    Return the user facing URL for a given URL.
    Handles deployment with proxies (like cloud run).
    """
    chainlit_url = os.environ.get("CHAINLIT_URL")

    # No config, we keep the URL as is
    if not chainlit_url:
        url = url.replace(query="", fragment="")
        return url.__str__()

    config_url = URL(chainlit_url).replace(
        query="",
        fragment="",
    )
    # Remove trailing slash from config URL
    if config_url.path.endswith("/"):
        config_url = config_url.replace(path=config_url.path[:-1])

    config_url_path = str(config_url)
    url_path = url.path
    chainlit_root = os.environ.get("CHAINLIT_ROOT_PATH")
    if chainlit_root and url_path.startswith(chainlit_root):
        url_path = url_path[len(chainlit_root):]

    return config_url_path + url_path