Merge pull request #7389 from Expensify/jules-addBetaInfoToContributi…

…ngMD

[NO-QA] Add beta flag section to the contributing readme

CONTRIBUTING.md

@@ -12,6 +12,10 @@ You can create as many accounts as needed in order to test your changes directly
 ##### Generating Multiple Test Accounts
 You can generate multiple test accounts by using a `+` postfix, for example if your email is test@test.com, you can create multiple New Expensify accounts connected to the same email address by using test+123@test.com, test+456@test.com, etc.
 
+#### Working on beta features
+
+Some features are locked behind beta flags while development is ongoing. As a contributor you can work on these beta features locally by overriding the [`Permissions.canUseAllBetas` function](https://github.com/Expensify/App/blob/5e268df7f2989ed04bc64c0c86ed77faf134554d/src/libs/Permissions.js#L10-L12) to return `true`.
+
 ## Code of Conduct
 This project and everyone participating in it is governed by the Expensify [Code of Conduct](https://github.com/Expensify/App/blob/main/CODE_OF_CONDUCT.md). By participating, you are expected to uphold this code. Please report unacceptable behavior to [contributors@expensify.com](mailto:contributors@expensify.com).