Feedback from Morgan and Diane

[msschwartz21]

• A few of the colored boxes for tasks and checkpoints are missing
• For the task of selecting the loss function, be more explicit about asking students to read the linked material about loss function options

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Universal tasks

• Update environment setup to use mamba (See https://github.com/dlmbl/DL-MBL-2023/wiki/Exercise-Guidelines#environment)
• Add a red callout block to the beginning of each notebook that specifies which kernel to use

<div class="alert alert-danger">
Please use kernel <kernel name here>
</div>

• Check for any references to slack. We are going to use Element this year.