zulip/docker-zulip
Set ZULIP_AUTH_BACKENDS to a comma-separated list of the backend names (e.g., "EmailAuthBackend,GoogleAuthBackend"). This takes the place of SETTING_AUTHENTICATION_BACKENDS.
ZULIP_AUTH_BACKENDS
"EmailAuthBackend,GoogleAuthBackend"
SETTING_AUTHENTICATION_BACKENDS
Authentication methods
Docker Zulip environment variables