fix(ui): allow cross origin (#5159)

Author: sguiheux

engine/api/websocket.go

@@ -22,7 +22,11 @@ import (
 	"github.com/ovh/cds/sdk/log"
 )
 
-var upgrader = websocket.Upgrader{} // use default options
+var upgrader = websocket.Upgrader{
+	CheckOrigin: func(r *http.Request) bool {
+		return true
+	},
+}
 
 type websocketClient struct {
 	UUID             string