Outdated Ubuntu Repositories

[sayyidyofa]

The dockerfiles in each services/challenges gets Ubuntu image with version 18.10 while using default repository list for apt commands, this will not work because each repository URL pattern for Ubuntu 18.10 has been changed from

http://archive.ubuntu.com/....

to

http://old-releases.ubuntu.com/....

This will cause errors when updating/installing with apt. The solutions are:

• Change each url in repository list to the correct one
• Use more recent Ubuntu docker image (like 20.04)

Reference:

https://superuser.com/questions/1527250/apt-update-error-with-ubuntu-18-10-cosmic-version

[farisv]

Thanks @sayyidyofa

Currently, this repository contains all files used during the competition (2018 final) as is. However, I'd like to rewrite all Dockerfiles to avoid this kind of error and other incompatibility issues when I have free time to do it.