Recover example docs structure

Fix default docs port

Don't use metadrop/mkdocs image anymore, use oficial image instead

Fixed command not being compatible with mkdocs newer image

Merge pull request #1 from Metadrop/update-docker-image

Update to 2.0.1

Fixed docker image version to keep an stable release

Added mkdocs command to allow run mkdocs without exec.

Fixed install process

Fixed default yml

Removed ddev- prefix from service name