Movim specifically works a bit better with ejabberd, who also provide easy to use containers.
Prosody is more of a Lego set to build your own server, so I don't think they even provided official container images for a long time. There is https://snikket.org/ though which is an opinionated distribution of Prosody with easy to use containers. Sadly Snikket doesn't play so well with Movim out of the box.
In general it is probably easier to start out with a rented VPS. You can move to your own server later on when you got the basics down. Since XMPP servers are quite lightweight they run fine on low end VPS that can be rented for as little as 1€/month.