Support using `docker compose` (docker compose v2) instead of
`docker-compose` (v1)
- Introduce `COMPOSE_V2` and `COMPOSE_COMMAND` variables
- Keep the default version at v1 (`COMPOSE_V2=0`)
- Refactor error message to expose that possibility
Signed-off-by: Nicolas signed-log FORMICHELLA <stigpro@outlook.fr>
* Migrate to using "remote themes" instead of forked content
* Update to most recent mmistakes
* Add docker-based testing
* Create Makefile for test targets
* Add travis-ci integration
* Update badges to use shields.io
* Replace splash page image (old one's attribution disappeared from
unsplash.com)
