Necessity to turn on memcache + question concerning docker?

Hello! I wonder:

  1. Is there strict necessity to turn on memcache for proper working within nextcloud? Or i can pass this alert in dashboard and works far Maybe files will be not synchronising corect between different compiters for one account and etc.
  2. Maybe it is possible to use next cloud in docker, it is more easeally then install nextclour on main server again

as long as the usergroup your server servs is not to big it should be fine. Installing nc is easy in docker with docker-compose and the initial setup for docker already done.