chore: Add envd in Docker section

[gaocegege]

envd is a machine learning development environment for data science and AI/ML engineering teams.

🐍 No Docker, only Python - Focus on writing Python code, we will take care of Docker and development environment setup.

🖨️ Built-in Jupyter/VSCode - First-class support for Jupyter and VSCode remote extension.

⏱️ Save time - Better cache management to save your time, keep the focus on the model, instead of dependencies.

☁️ Local & cloud - envd integrates seamlessly with Docker so that you can easily share, version, and publish envd environments with Docker Hub or any other OCI image registries.

🔁 Repeatable builds & reproducible results - You can reproduce the same dev environment on your laptop, public cloud VMs, or Docker containers, without any change in setup.