Added stuff

docs/contact.md

docs/index.md

docs/system-databases-auth.md

docs/system-databases-data.md

docs/system-databases-metadata.md

docs/system-databases-search.md

docs/system-other-search-dashboard.md

docs/system-other-ui.md

docs/system-services-analyse.md

docs/system-services-authentication.md

docs/system-services-broker.md

docs/system-services-data.md

docs/system-services-gateway.md

docs/system-services-metadata.md

docs/system-services-mirror.md

docs/system-services-upload.md

mkdocs.yml