Quick question: In my Next.js/Vercel medical app (alephra.com), when users upload medical reports to POST /api/reports, I'd like to automatically send them an email asking for feedback ('How was your experience?'). What's the easiest/best way to trigger this email right when the API route succeeds? Should I use SendGrid, Nodemailer (with Vercel Edge/Serverless), or is there a simpler solution you recommend for fast development? Bonus points for a code snippet or example. Thanks!