I found the Ansible playbook [1] on GitHub extremely easy to use. As long as you know how to configure DNS records and firewalls, the rest is taken care of. This is what I use today to manage my Synapse server.

Also Oracle Cloud offers free ARM instances with 4 CPU cores and 24 GB of RAM, more than enough to run a very speedy Synapse server.

[1]: https://github.com/spantaleev/matrix-docker-ansible-deploy