What is a Service?

https://en.m.wikipedia.org/wiki/Server_(computing)

Server client vs peer to peer

Within web based services, this often means features that can be accessed by creating a user account.  For some services, there are a single user, whereas others low for true multiuser environment.  Services will often have their own interface, especially within a browser.  Some may need to be configured through files, but many work with gui configuration.

Integration with Authelia, reverse proxy.

In relation to SaaS

https://en.m.wikipedia.org/wiki/Software_as_a_service

Docker vs service vs port

Free  freemuim, subscription, usage based

Funding, advertising, selling consumer data

Many services offer apis

Federation

These remove the control of software from users and make them subscription based.  You can't own a CD with the service available for install.  There is only one version of the app, hosted by the service provider.  Even extension apps only interact with the current version through API.

 

https://en.m.wikipedia.org/wiki/As_a_service

As a service business model, subscription based instead of something owned