refs #230

upgrade docker dev's php version to 8.1

Romain de Laage authored 2 years ago and Yassine Doghri committed 2 years ago

- add docker images for app (castopod) and web-server (nginx)
- ci: deploy images continuously to a docker hub using kaniko
- ci: trigger docker-build-rolling on develop branch
- move development DockerFile to docker directory

closes #200