* configure Loki for local development
Extend our docker compose setup to include Loki (along with promtail), scraping `logs/*.log` to ingest development logs as well as all logs from running containers.
While we're in here, teach Prometheus to scrape metrics from Docker containers too.
* tweak promtail labels
* document extra services in config.mk
* update home.json
MySQL 5.7 is at end of life.
https://mattermost.atlassian.net/browse/MM-55589
```release-note
We bump up minimum MySQL version to be 8.0.0
```
Co-authored-by: Mattermost Build <build@mattermost.com>
Co-authored-by: Ibrahim Serdar Acikgoz <serdaracikgoz86@gmail.com>