Add a script to build the Ruby image and test locally

Author: rafaelfranca

.devcontainer/devcontainer.json

@@ -0,0 +1,27 @@
+// For format details, see https://aka.ms/devcontainer.json. For config options, see the
+// README at: https://github.com/devcontainers/templates/tree/main/src/docker-in-docker
+{
+	"name": "Docker in Docker",
+	// Or use a Dockerfile or Docker Compose file. More info: https://containers.dev/guide/dockerfile
+	"image": "mcr.microsoft.com/devcontainers/javascript-node:0-18",
+
+	"features": {
+		"ghcr.io/devcontainers/features/docker-in-docker:2": {
+			"version": "latest",
+			"enableNonRootDocker": "true",
+			"moby": "true"
+		}
+	},
+
+	// 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": "npm install -g @devcontainers/cli"
+
+	// Configure tool-specific properties.
+	// "customizations": {},
+
+	// Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
+	// "remoteUser": "root"
+}

bin/build-image

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+#!/bin/bash
+
+# Check if Ruby version is provided
+if [ -z "$1" ]; then
+  echo "Usage: $0 <ruby-version>"
+  exit 1
+fi
+
+RUBY_VERSION=$1
+
+devcontainer build --workspace-folder images/ruby --image-name ghcr.io/rails/devcontainer/images/ruby:$RUBY_VERSION --output /tmp/output.tar