forwarded_allow_ips variable not applied to gunicorn launch about docker-firefox-syncserver

[rainforest1155]

I noticed one potential issue in the docker container. While it's running I opened a shell and looked at the app/docker-entrypoint.sh file, which starts off with:

#!/bin/sh

cd $(dirname $0)
case "$1" in
    server)
        export SYNCSERVER_SQLURI="${SYNCSERVER_SQLURI:-sqlite:///tmp/syncserver.db}"
        exec gunicorn \
            --bind ${HOST-0.0.0.0}:${PORT-5000} \
            --forwarded-allow-ips="${SYNCSERVER_FORWARDED_ALLOW_IPS:-127.0.0.1,172.17.0.1}" \
            syncserver.wsgi_app
        ;;

It lists this variable SYNCSERVER_FORWARDED_ALLOW_IPS while I believe the variable name should actually be FF_SYNCSERVER_FORWARDED_ALLOW_IPS.

That said, I'm not versed in docker and wasn't actually sure how to make changes to that file to test this as each time the docker is stopped and restarted, the change seems to revert.