Update container environment to use Hugo's own images.

.devcontainer/devcontainer.json

@@ -16,7 +16,7 @@
 
 	// The optional 'workspaceFolder' property is the path VS Code should open by default when
 	// connected. This is typically a file mount in .devcontainer/docker-compose.yml
-	"workspaceFolder": "/src"
+	"workspaceFolder": "/project",
 
 	// Features to add to the dev container. More info: https://containers.dev/features.
 	// "features": {},
@@ -37,5 +37,5 @@
 	// "customizations": {},
 
 	// Uncomment to connect as an existing user other than the container default. More info: https://aka.ms/dev-containers-non-root.
-	// "remoteUser": "devcontainer"
+	"remoteUser": "root"
 }