* unify env_var names to replace
* detail more and improve docker doc
* fix title
* move acme email and domains to traefik command
* add details about TRAEFIK_ACME_* variables
* Fix preview links from /develop to /master
* Sticking to one env-var management system
Starting with the Postgres container so that you only have to set overlapping environment variables in one place.
* Moving Postfix envvars pt 1
* Moving Postfix envvars pt 2 .env file
* Added missing envvars.
* Adding functioning glue
Suggest something better if you wish.
* removed IP from example
* Removed default network from update.