[2.3.0] Checkmk Werk 16594 created: Container: Support setting custom timezone

[//]: # (werk v2) # Container: Support setting custom timezone key | value ---------- | --- date | 2024-08-21T15:44:20+00:00 version | 2.3.0p14 class | feature edition | cre component | packages level | 1 compatible | yes The checkmk containers now support setting the TZ variable for a container to specify what timezone the site should use. The timezone information is then set for the site running inside the container. This removes the need to mount timezone files from the host machine into a docker container.