Borderlands 3 hotfix modding tutorial using docker

I followed this guide to mod my Borderlands 3 installation: https://www.reddit.com/r/borderlands3/comments/ibzvcz/hotfix_modding_tutorial_play_cartels_today_or_any/?sort=new.

The difference between my guide and the one from reddit is that i don’t want to install anything new, so having docker, i used that to run the needed software.

This is my docker-compose file:

version: "2.5"

services:
    mitmproxy:
        container_name: mitm
        image: mitmproxy/mitmproxy
        volumes:
            - ./.mitmproxy:/root/.mitmproxy
            - ./bl3hotfixmodding:/bl3
        ports:
            - 127.0.0.1:18080:8080
            - 127.0.0.1:18081:8081
        stdin_open: true # docker run -i
        tty: true        # docker run -t
        environment:
            - a=a
        # entrypoint: '/bin/sh -c "stty rows 24 cols 80 && mitmdump -s /bl3/hfinject.py && mitmweb --web-host 0.0.0.0"'
        entrypoint: '/bin/sh -c "stty rows 24 cols 80 && mitmdump -s /bl3/hfinject.py"'