Add unzip install instructions and root directory note

Author: camspec

docs/src/content/docs/start-here/initial-setup.mdx

@@ -72,7 +72,7 @@ If not, open a terminal and run the following commands to install Git:
     pip install -r requirements.txt
     pip install -e .
 
-7. Setup pre-commit:
+7. Setup the pre-commit by running the following commands in the repository's root directory. You may need to install unzip in order to install Deno. If you do not have unzip, run `sudo apt install unzip`.
 
     ```shell
     # The first command installs Deno, which is required for our pre-commit