Closes#7
Added a simple validation package we can expand on. For now we can use it to validate links that get sent to the bot and make sure that:
1. It's an actual url
2. It's a url for a service we support
Also added a make file to run tests and other tasks we might need in the future.
Added a github action to run tests.
Reviewed-on: #19
Co-authored-by: Javier Feliz <me@javierfeliz.com>
Co-committed-by: Javier Feliz <me@javierfeliz.com>
