Docker build “Could not resolve 'archive.ubuntu.com'” apt-get fails to install anything

Question

I\'ve been trying to run Docker build on various files which previously worked before, which are now no longer working.

As soon as the Docker file included any line

Answer 1

Before spending too much time on any of the other solutions, simply restart Docker and try again.

Solved the problem for me, using Docker Desktop for Windows on Windows 10.