fix(.devcontainer): start docker and install devcontainer CLI (#18621)

This change starts the Docker daemon in the devcontainer and install
`@devcontainers/cli`.

.devcontainer/devcontainer.json

@@ -56,5 +56,6 @@
 		// See: https://github.com/devcontainers/spec/issues/132
 		"source=${localEnv:HOME},target=/mnt/home/coder,type=bind,readonly"
 	],
-	"postCreateCommand": "./.devcontainer/postCreateCommand.sh"
+	"postCreateCommand": "./.devcontainer/postCreateCommand.sh",
+	"postStartCommand": "sudo service docker start"
 }

.devcontainer/postCreateCommand.sh

@@ -1,5 +1,9 @@
 #!/bin/sh
 
+install_devcontainer_cli() {
+	npm install -g @devcontainers/cli
+}
+
 install_ssh_config() {
 	echo "🔑 Installing SSH configuration..."
 	rsync -a /mnt/home/coder/.ssh/ ~/.ssh/
@@ -49,6 +53,7 @@ personalize() {
 	fi
 }
 
+install_devcontainer_cli
 install_ssh_config
 install_dotfiles
 personalize