Docker Version Management - latest versus specific version

[LotusJeff]

A large number of the dockerfile containers use the :latest parameter to pull the most recent version of the software.

This recently caused problems with the nginx-proxy version 0.6.0. See: https://community.easyengine.io/t/site-down-after-updating-to-v4-0-12/12610/17

There should be a config file available to specifically define the version the dockerfile uses. This would allow a user the ability to downgrade from the latest due to known issues.

For example, the config file could look like:

cron:latest
mailhog:v1.0.0
mariadb:10.2
nginx-proxy:latest
nginx:stretch

The other options are to place the dockerfiles on the server and build the dockers from on server dockerfiles.