Improve docker build to upload images to docker hub

[naittaleb]

Add necessary GitHub actions to build, push & clean Requires the romi organization name ? (instead of roboticsmicrofarms)

Links:

• https://sysdig.com/blog/dockerfile-best-practices/

• https://docs.github.com/en/actions/guides/publishing-docker-images

• Remove passing arguments related built-in user: instead use a default name

• Make the database folder (readable-writable) for all users: the goal is to be able to fill the folder and retrieve the results.

• create a .dockerignore