Ask HN: Production setup for apps

As I inch closer to going live to production with my app, I am curious about what production setups do other people have and what services are being used?

Mine are two Heroku apps - Rails-API backend (served on a subdomain) & React SSR frontend respectively. In addition, I am setting up CloudFlare, Imgix for images, S3 for storage.

I still need to figure out solutions for SSL, and CDN (if any additional).

What are your setups? And any experiences with any of the services mentioned?