Enable CORS for all methods and origins #11

We at Mobus Operandi frequently forget to start the timer. So we had this idea when the driver starts screen sharing the timer would be started automatically.

We are using Jitsi Meet in a browser for the video call and screen sharing. We figured out how to do this but the browser doesn't allow us to make the request because CORS headers are not present in the preflight response from the server.

We'd be happy to submit a pull request that enables CORS for all methods and origins, in the global Spring configuration.

The change would be something like this:

allowed-origins="*"
allowed-methods="GET, HEAD, POST, PUT"