make container run as root

.devcontainer/devcontainer.json

@@ -28,5 +28,5 @@
 	// "postCreateCommand": "gcc -v",
 
 	// Comment out connect as root instead. More info: https://aka.ms/vscode-remote/containers/non-root.
-	"remoteUser": "vscode"
+	"remoteUser": "root"
 }