How to handle big workloads with minimal infrastructure?

The Pirate Bay uses/used a relatively simple setup (not sure if it's still the same): https://torrentfreak.com/the-pirate-bay-runs-on-21-raid-proo...

Depends on the site... Cloudflare 200/mo you need minimal infrastructure behind the scenes if Cloudflare takes the hit, start small, scale up as and when things get busy.

Serverless Framework has issues but it’s pretty low ops.

You just can’t beat Kube for scale though.