Deploying with a private GitHub repository

If you are coding for a side project, company, or paid feature, you will be working with private GitHub repositories. This makes sense as we do not want people accessing a repository for free that you or your company plans on charging them for. However, if we set our Rust Fibonacci package's GitHub repository to private, delete all of our Flask images using the docker image rm YOUR_IMAGE_ID_HERE command, and run our docker build . -t flask-fib command again, we would get the following printout:

Collecting git+https://github.com/maxwellflitton/flitton-
fib-rs@main
Running command git clone -q 
https://github.com/maxwellflitton/
flitton-fib-rs /tmp/pip-req-build-ctmjnoq0
Cloning https://github.com/maxwellflitton/flitton-fib-rs 
(to revision main) to /tmp/pip-req-build-ctmjnoq0
fatal: could not read Username for 'https://github.com': 
No such device or address

This is because our isolated Linux-based Docker image that is...