Example devcontainer setting of Jupyter for Ruby

devcontainer.json

// For format details, see https://aka.ms/devcontainer.json. For config options, see the README at:
// https://github.com/microsoft/vscode-dev-containers/tree/v0.205.2/containers/ruby
{
  "name": "rubydata/datascience",
  "image": "rubydata/datascience-notebook:latest",

  // Set *default* container specific settings.json values on container create.
  "settings": {},

  // Add the IDs of extensions you want installed when the container is created.
  "extensions": [
    "rebornix.Ruby",
    "ms-python.python",  
    "ms-python.vscode-pylance",
    "ms-toolsai.jupyter",
    "ms-toolsai.jupyter-keymap",
    "julialang.language",
    "Ikuyadeu.r"

  ],
  "mounts": [
    "type=bind,src=${localWorkspaceFolder}/notebooks,dst=/notebooks"
  ],
  "workspaceFolder": "/notebooks",
  "initializeCommand": "mkdir -p notebooks"
}

• https://hub.docker.com/r/rubydata/datascience-notebook
• https://github.com/RubyData/docker-stacks/blob/master/datascience/Dockerfile