Feature Request: Running The Odin Project Locally - clarify instructions

[X] I have thoroughly read and understand The Odin Project Contributing Guide
[X] The title of this issue follows the Feature Request: brief description of feature request format, e.g. Feature Request: Add a dark mode to the website
[X] Would you like to work on this issue?

Currently, the "Set Up DotEnv" section is missing some instructions / inconsistent.

[ ] Guide needs to be tell the reader to "cd" into the local TOP repository before asking the reader to run cp env.sample .env (make it clear env.sample is in the local repository directory)
[ ] Explicitly tell the reader to set postgress password with postgres=# \password YOURUSERNAME. That this password will be stored in the .env file in the instructions that follow. Then it should be more clear what the document means by "Then edit the newly created .env file to include your Postgres Username and Password." The Linux Installation Guide currently makes this sound optional.

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TheOdinProject / theodinproject