Can't access documentation

Hello. I wanted to try instapy with docker and tried following the [complete functions documentation](https://github.com/timgrossmann/InstaPy/blob/master/DOCUMENTATION.md) but the link is dead and I really don't want to make something stupid with the bot.

Any chance you can update it please ?

Thanks

Start by checking the documentation that points to the dead complete functions documentation link and compare it with the linked InstaPy DOCUMENTATION.md location. Update the reference to a working documentation page, then verify the link resolves and the Docker documentation no longer sends users to the dead page.

Scritto dal modello di indicizzazione a partire dal testo della issue.