Notes and suggestions - quick tutorial check

[trallard]

On the readme of the tutorial:

• - Add details of what is in the directory (prep, notebooks, environment...)

💡 General idea

• - Add summaries or checkpoints of the essential points / best practices you are introducing

00-Introduction

• - Select the instance suggestion: use a rectangle to highlight the instance in the screenshot

02-intro....

• - Add a note about 10 mins break

04-Storage

• - Link to gcfs docs is broken (there are a couple of links broken, so we need to do a pass on this)