Quick introduction into how to use the newly released model GPT-4o.

If your actions have a long installation step (or very big node_modules) you can cache the installation step using the GitHub action actions/cache

Did you know that the official GitHub actions provide a shortcut for the latest major version? Any action that [starts with `actions/`](https://github.com/actions) usually has two versions that you can use.

Find out how you can fail-fast every CI check, letting your developers fix every test at the same time

An introduction into how tricky it is to obtain the output from a matrix

Hello World! This is the first entry. import os print(f'hello {os}')