For decades we've hosted systems and doing it in the cloud works just as well. The cloud is just off premises computers.
On top of the physical layer and below your apps, there are additional layers like containers and runtimes. Each app has its own required configuration and operational profiles.
When we create a solution we'll usually sell managed services. We can manage a handful of services that we sell a lot of, such as mastodon, xmpp, social app/hogumathi and wagtail cms (coming soon).
Linux
Docker
Volumes
Kubernetes
Self-hosting
Popular app clones
Integrations