devcontainer.json

{
	"name": "Ruby",
	"runArgs": ["--init"],
	"build": {
		"dockerfile": "Dockerfile",
		"args": { 
			// Update 'VARIANT' to pick a Ruby version: 3, 3.0, 2, 2.7, 2.6
			// Append -bullseye or -buster to pin to an OS version.
			// Use -bullseye variants on local on arm64/Apple Silicon.
			"VARIANT": "3-bullseye",
			// Options
			"NODE_VERSION": "lts/*"
		}
	},

	// 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"
	],
	
	// Use 'forwardPorts' to make a list of ports inside the container available locally.
	// "forwardPorts": [],

	// Use 'postCreateCommand' to run commands after the container is created.
	// "postCreateCommand": "ruby --version",

	// Comment out connect as root instead. More info: https://aka.ms/vscode-remote/containers/non-root.
	"remoteUser": "vscode",
	"postStartCommand": "bundle install",
}