Update docker structure

[WesSec]

I made small changes to the docker structure, it now copies the local files in the dockerfile sequence instead of cloning the GitHub repo again. This will reflect local changes such as changes in de .env.docker file (which i use to change database location)

This shouldn't affect any documentation or other workflows

[zzzteph]

Thanks! The initial idea was to create a docker image that could be published to docker.hub. Not 100% how it should be done, but maybe, in this case, copying files from the git repository will require. But it's another kind of task =)

[zzzteph]

Dockerfile should be moved to the root folder in this case.

[WesSec]

Depending on how you want to structure the project it could be moved to root folder indeed (which is a better practice, but didn't want to make too many changes to the total structure for now).