[DOCKER] Sendy available on hub.docker.com
I use docker for all my installations and recently created one for Send 4.1.0. You can find all the instructions, Dockerfile, docker-compose.yml, etc on hub.docker.com.
The docker image repository has a section to report Docker-specific issues. While I'll do my best to address them, please realize I have a full-time job and family. :-)
If you're interested in assisting with issues or extending this project, feel free to leave a comment with text [DOCKER-CONTRIBUTE] in body and your github.com username.