Fix dependency vulnerabilities (#577)
* fix: 🐛 update ujson
fixes
https://github.com/huggingface/datasets-server/security/dependabot/2
* fix: 🐛 update lxml
fixes
https://github.com/huggingface/datasets-server/security/dependabot/3
* fix: 🐛 update oauthlib
fixes
https://github.com/huggingface/datasets-server/security/dependabot/4
* feat: 🎸 update docker images
