Add a note to be in the proper location when running DBT commands.

Why is this change being made?

Add a note to be in the proper location when running DBT commands. This is handy primarily for new starters as it is vital to be in the proper directory when running make run-dbt or any other dbt command.

Inspired by https://gitlab.slack.com/archives/C8D1LGC23/p1642427527011300

Author Checklist

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