How do I add tags to my exceptions?

1 
Sentry.init({
	dsn: process.env.SENTRY_DSN,
	tags: {
		process_name: 'webserver',
	},
})

Sentry.configureScope(scope => {
	scope.setTag('process_name', 'webserver')
})

Both attempts to add a tag does not work. How do I add tags using the new Sentry node API?