Update CONTRIBUTING.md - information about running unit tests

CONTRIBUTING.md

@@ -6,34 +6,39 @@ Thank you for choosing this project to contribute to, we are all very grateful!
 
 📣 Discussions - where you can start a new topic or answer some questions
 
-🐞 Issues - Is how we track tasks, sometimes its bugs that need fixing, sometimes its new features
+🐞 Issues - This is how we track tasks, sometimes it is bugs that need fixing, and sometimes it is new features
 
-🛠️ Pull requests - Is how you can suggest changes to our repository, to work on existing issue or to add new features
+🛠️ Pull requests - This is how you can suggest changes to our repository, to work on existing issues or add new features
 
 📚 Wiki - where we have our documentation
 
 
 ## 🐞 Issues and Pull requests
 
-We value contributions to our issues in form of discussion or suggestion, we recommend that you check out existing issues and our [Roadmap](https://github.com/orgs/arc53/projects/2)
+We value contributions to our issues in the form of discussion or suggestion, we recommend that you check out existing issues and our [Roadmap](https://github.com/orgs/arc53/projects/2)
 
-If you want to contribute by writing code there are few things that you should know before doing it:
+If you want to contribute by writing code there are a few things that you should know before doing it:
 We have frontend (React, Vite) and Backend (python)
 
 ### If you are looking to contribute to Frontend (⚛️React, Vite):
-Current frontend is being migrated from /application to /frontend with a new design, so please contribute to the new on. Check out this [Milestone](https://github.com/arc53/DocsGPT/milestone/1) and its issues also [Figma](https://www.figma.com/file/OXLtrl1EAy885to6S69554/DocsGPT?node-id=0%3A1&t=hjWVuxRg9yi5YkJ9-1)
-Please try to follow guidelines
-
+The current frontend is being migrated from /application to /frontend with a new design, so please contribute to the new one. Check out this [Milestone](https://github.com/arc53/DocsGPT/milestone/1) and its issues also [Figma](https://www.figma.com/file/OXLtrl1EAy885to6S69554/DocsGPT?node-id=0%3A1&t=hjWVuxRg9yi5YkJ9-1)
+Please try to follow the guidelines.
 
 ### If you are looking to contribute to Backend (🐍Python):
 * Check out our issues, and contribute to /application or /scripts (ignore old  ingest_rst.py ingest_rst_sphinx.py files, they will be deprecated soon)
 * All new code should be covered with unit tests ([pytest](https://github.com/pytest-dev/pytest)). Please find tests under [/tests](https://github.com/arc53/DocsGPT/tree/main/tests) folder.
 * Before submitting your PR make sure that after you ingested some test data it is queryable.
 
+### Testing
+To run unit tests, from the root of the repository execute:
+```
+python -m pytest
+```
+
 ### Workflow:
-Create a fork, make changes on your forked repository, submit changes in a form of pull request
+Create a fork, make changes on your forked repository, and submit changes in the form of a pull request.
 
-## Questions / collaboration
+## Questions/collaboration
 Please join our [Discord](https://discord.gg/n5BX8dh8rU) don't hesitate, we are very friendly and welcoming to new contributors.
 
 # Thank you so much for considering contributing to DocsGPT!🙏