Error 405. What am I missing?

[justdaj]

This is perhaps a dumb question, but do I need to run this on the same server as a Mastodon instance?

There's nothing in the docs here to suggest I do, but despite my best efforts I can not get the Relay to work. I am almost there. if I goto /actor I get a json response. /inbox gives me an HTML 405 error

I can add it as a relay on a mastodon instance, and it then shows as "waiting for approval". When I check the relay and ask for a list, the mastodon instance is listed

It made me wonder if the Relay needs mastodon configured on the server too.

OR am I missing something else