precommit command documentation

Author: calebyhan

README.md

@@ -5,7 +5,7 @@ A CS+SG project for the Undergraduate Senate at UNC Chapel Hill.
 ## Contributors
 
 | Name            | Role            |
-| -------------   | --------------- |
+| --------------- | --------------- |
 | Caleb Han       | Tech Lead       |
 | Mason Mines     | Project Manager |
 | Xander Pak      | Developer       |
@@ -83,6 +83,12 @@ cd ../backend
 cp .env.example .env # duplicates the template and renames it to .env
 ```
 
+Run pre-commit checks locally
+
+```bash
+pre-commit run --all-files # make sure to run this command before making any commits to ensure code quality and consistency
+```
+
 Or you can do the actions manually. Then,
 
 - Ensure you have Docker and the Dev Containers extension installed