Merge pull request Overv#168 from Overv/ubuntu-20.04

Upgrade to Ubuntu 20.04

Show progress output for wget by default (fixes Overv#156)

Merge pull request Overv#119 from Sohalt/master

Use https everywhere and remove `--allow-unauthenticated`

Add support for host mounts (fixes Overv#94)

Change custom config to be overridable

Make setup for automatic updates optional through UPDATES variable

Fix remaining references to PostgreSQL 10

Merge branch 'Y0ngg4n-postgresql-12-upgrade'

Add proper handling of docker stop

Merge pull request Overv#71 from stevo01/master

use carto version 0.18.2 to solve carto conflicts / warnings