fix(xo-server/proxies): use Host of the config
fix(xo-server/proxies): use Host of the config

Use the hostname of the URL in the config instead of the one from the incoming request.

lmcro/xo-web,lmcro/xo-web,vatesfr/xo-web,lmcro/xo-web,vatesfr/xo-web