fix for rendering enviroment variables for docker compose

[StevusPrimus]

This improves the way the config can be passed via docker compose.

[StevusPrimus]

https://github.com/StevusPrimus/cs-openresty-bouncer/pkgs/container/cs-openresty-bouncer for testing

[LaurenceJJones]

Currently this will break all known Kubernetes deployments as the BOUNCER_CONFIG is currently used to update the environment to point towards a new file.

So if this is merged then all ingresses would encounter issues, I would use another environment variable name that was not existing before.

[StevusPrimus]

Sure will check this!

[StevusPrimus]

@LaurenceJJones do you think it is maybe better to just add all single missing parameters to the docker-start.sh, instead of using a multiline env variable? I think that's more according to standard right?

[StevusPrimus]

All done. Depending on crowdsecurity/lua-cs-bouncer#75