Some sites are dead simple, with an SQLite data store, and static content served directly. Some apps are running on AWS ECS, auto scaling up to hundreds of VMs in response to bursty workloads.

Generally though, I’m running docker compose for local development environments, and docker swarm in production. (Until autoscaling requires something like ECS)

Docker makes it easy to define everything in code. (A redis instance, worker instances vs web instances, db, etc)