I've set up Resend for Next.js and created a server action that triggers emails, which works great. However, I'm not sure how to style the newsletters. I use Strapi, and if possible, I would like to write the newsletter content in Strapi and style it with React Email. But I'm unsure how to achieve this, given that the components in my newsletters will vary. In first I want to have maybe CTA for something but in other I want to have image gallery.