Suggestions from @josojo

[bh2smith]

This PR addresses all of the following comments. cc @josojo

• I think you should make the steps in the readme easier to follow: e.g. cd dunecon-workshop is missing
• I think you should encourage everyone to use a venv
• .env.sample is still empty
• python -m 1-basic-fetch works super nicely like it!
• I would put 3-data-modeling.py as the second example. Its much easier and closer to the first example
• I was not able to execute the second example, as adding a slack bot was quite some overhead. Not sure whether others will try it. maybe sending an email is the easiest example?

For the last part, we updated the open issue in dune-alerts adding AlertLevel.EMAIL as a third possibility.