create private feed or cache nuget packages

hi everyone

i am newbie in azure devops. how can i add a private feed in azure devops server? 

i have a .net 6  application and need to restore nuget packages. i connect  azure devops to docker swarm by agent . my problem is that every time run release pipeline ,   the azure download nuget packages again. i want to cache or create a private nuget.

this is my release pipeline