Build a Docker Compose version

[samdbmg]

It would be nice to have a single Compose file that has the same effect as deploying this role. So it generates a suitable Traefik config, and runs the socket proxy, forward auth and Traefik containers, configured by some env vars. That way the non-Ansible user experience becomes "copy the compose file, set config vars, do docker-compose up

• Figure out config file generation
• Build the Compose file and get it working
• Look at better ways of keeping config options in sync between env vars and Ansible vars?
• Adapt the CI to run the same set of tests in Compose mode
• Document this new way of working

[samdbmg]

Progress so far in https://github.com/samdbmg/ansible-traefik-auth-proxy/tree/feat/docker-version

Config File Sync
For keeping the config files in sync, it might be possible to parse defaults/main.yml to extract all the config keys, then set them programmatically using set_fact?

Or get the entire list and write an entrypoint script that sets anything starting PROXY_ as an extravar - maybe that's neater.

Compose File
It might make more sense in the docs to recommend doing docker-compose run config-generator and then docker-compose up -d reverse-proxy to avoid having to generate config every time, and oddities where startup fails until the config is available.