Dana/db setup

[wandering-dotcom]

added docker-compose.yml which will configure and run InfluxDB3, InfluxDB UI, Mosquitto, Grafana, mqtt bridge (custom service connecting mqtt broker to InfluxDB) + files for mqtt bridge inside /server/db/

Note:

• have been using env variables for InfluxDB token, etc
• for mqtt bridge, will need to change name of folder or add subfolder since docker-compose.yml right now builds looking inside mqtt_bridge, not db