Updated documentation

docs/contact.md

docs/customization.md

docs/deployment-kubernetes-azure.md

docs/deployment-kubernetes-openstack.md

docs/deployment-vm.md

docs/get-started.md

docs/images/architecture-kubernetes.png

docs/images/architecture-vm.png

docs/images/architecture.png

docs/publications.md

docs/stylesheets/extra.css

docs/system.md

docs/usage-broker.md

docs/usage-identifier.md

docs/usage-overview.md

misc/.$architecture.drawio.dtmp

misc/.$architecture.drawio_1.dtmp

misc/architecture.drawio

mkdocs.yml