GPG is known to have usability issues and is generally cumbersome to
use. age [0] is a modern alternative to GPG that is designed by a
cryptographer that has worked and continues to work on Golang's crypto
packages for years.
Allowing age to be used to encrypt backups dramatically simplifies the
backup process.
[0]: https://age-encryption.org/
* Try running tests in Docker
* Spawn new container for each test
* Store test artifacts outside of mount
* When requested, build up to date image in test script
* sudo is unneccessary in containerized test env
* Skip azure test
* Backdate fixture file in JSON database
* Pin versions for azure tools
* Mount temp volume for /var/lib/docker to prevent dangling ones created by VOLUME instruction
* Fail backdating tests with message
* Add some documentation on test setup
* Cache images
* Run compose stacks with shortened default timeout
