repository err

Docker gives error

E: The repository 'http://security.ubuntu.com/ubuntu eoan-security Release' does not have a Release file.
E: The repository 'http://archive.ubuntu.com/ubuntu eoan Release' does not have a Release file.
E: The repository 'http://archive.ubuntu.com/ubuntu eoan-updates Release' does not have a Release file.
E: The repository 'http://archive.ubuntu.com/ubuntu eoan-backports Release' does not have a Release file.

Change this

pwn_docker_example/challenge/Dockerfile

Line 4 in 79c63b1

FROM ubuntu:19.10

to

FROM ubuntu

Thanks