Update with latest definition

.devcontainer/devcontainer.json

@@ -1,25 +1,32 @@
 {
 	"name": "PHP Sample",
-	"dockerFile": "Dockerfile",
+	"build": {
+		"dockerfile": "Dockerfile",
+		"args": { 
+			// Update VARIANT to pick a PHP version
+			"VARIANT": "7",
+			"INSTALL_NODE": "true",
+			"NODE_VERSION": "lts/*"
+		}
+	},
 	
-	// Use 'settings' to set *default* container specific settings.json values on container create. 
+	// Set *default* container specific settings.json values on container create.
 	"settings": { 
 		"terminal.integrated.shell.linux": "/bin/bash"
 	},
-		
-	// Add the IDs of extensions you want installed when the container is created in the array below.
+
+	// Add the IDs of extensions you want installed when the container is created.
 	"extensions": [
 		"felixfbecker.php-debug",
 		"felixfbecker.php-intellisense"
 	],
-	
+
 	// 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": "php -v",
 
-	// Comment out if you want to use root
+	// Comment out to use the root user instead. See https://aka.ms/vscode-remote/containers/non-root.
 	"remoteUser": "vscode"
-
 }