Tmux builder

This Dockerfile builds tmux from source and outputs the binary and man files to the builder host. Allows compilation of newer tmux versions without the need to install anything, other than Docker. Supports the following build args:

• BASE_OS
• GIT_BRANCH

Usage

$ DOCKER_BUILDKIT=1 docker build -t tmux-builder --output ~/tmp/tmux/ \
    --build-arg GIT_BRANCH=3.2a --build-arg BASE_OS=ubuntu:jammy .