I've been running a Tor relay for quite a bit of time now in a Docker container. When I wanted to do so initially I found a few guides for running Tor relays as containers, but they were either lacking in details, didn't work or attempted to be more user friendly than needed, complicating the configuration even more. All I wanted was a simple way to get started quickly. I ended up figuring out how it was done by stitching together a solution from here and there, and this StackExchange Q/A describes the steps I went through to configure the relay as a container.
From the community side of things I highly urge those who are able to, to run a Tor relay. We're strong in numbers, and at least now the learning curve of configuring a relay is not an excuse to not get started. ;)
Thank you for reading. Feedback is greatly appreciated!