Docker overlay 2 is taking up more and more space

[wonderhong]

Hello, I have been deploying the Docker for this project for several months and have noticed that the available disk space is getting smaller and smaller.After entering the/var/lib/Docker/Overlay2 and using the du - sh command, I found a folder size reached 20G.After searching, it was found that its container name is epicgames.Entering the diff and merged folders separately and checking the size of the sub folders in these two folders, it was found that the tmp files both reached 9GB or more.May I ask if the contents of these two tmp folders can be deleted? How can I avoid this situation from happening again?