Update for 0.7

* Container now always runs as non-root user
* INSTANCE_ID is deprecated
* Volumes now match the 0.7 structure
* Use named volumes
* Add new default files
* Add example for multiple instances
* Update readme

Update to Ubuntu 20.04 and latest stable Wine

Add FAudio dependency for Wine 5

Fix wget command

Upgrade to 0.6.1

Add verbose Wine option

Add environment variables to docker-compose.yml

Switch to wine staging

Switch to wine stable

Do not wait for Xvfb to start