use template

[onokatio]

Description

docker-compose.yml has many re-use content for replica instance like auth-1 mix-1. So aggrecate same keys to template for readability.

Type of change

How Has This Been Tested?

Checklist:

• [x] I have performed a self-review of my code
• [ ] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation
• [ ] I have checked that any new log messages doesn't inavertedly link compromising information to an external observer about the Meson Mixnet.