fix: [CORS] Add the default config to authorize CORS on RQLIO

Fabien Amarger requested to merge topic/default/rqlio-cors into branch/default

The domain authorized id '' for the specific route /rqlio.

All other configuration is not authorized here.

PS : not sure it is the good place to add the MR since it is an open source projet here. But I do not know where to add this if not here. Furthermore, I am not confident about this code clarity. It could be nice to have a dedicated file to define the CORS headers, and find a way to not repeat the proxy_pass configuration for the two routes (/ and /rqlio). @emartinet If you have any recommendations here I would appreciate it :).

Merge request reports