[ACA-1696] contextmenu (#587)

* enbale contextmenu by default

* attach event only when backdrop is set

* outside event for contextmenu

* apply outside event directive

* workaround fro contextmenu event row selection

* remove Output parameter

* update dockerfile

* update docker compose file

docker-compose.yml

@@ -81,7 +81,7 @@ services:
         #     - ./nginx.conf:/etc/nginx/conf.d/default.conf
 
     proxy:
-        image: nginx
+        image: nginx:stable-alpine
         depends_on:
           - content-app
         volumes: