Enhance Documentation on Environment Variables Setup

[greemaltend4]

Description

The current documentation provides a brief overview of the required environment variables that need to be set in the repository settings. However, it lacks detailed instructions on how to generate and securely manage these tokens, particularly for newcomers who may not be familiar with Firebase or GitHub Actions.

Suggested Improvements

1. Detailed Steps for Token Generation: Include more detailed instructions on generating tokens for SERVER_OPERATOR_TOKEN and MARKET_TOKEN, including any prerequisites and security considerations.

2. Example Configuration: Provide an example of how the repository settings should look like after configuring the required environment variables, including both names and placeholder values.

3. Environment Variables Overview: Consider adding an overview section that explains the purpose of each environment variable, which can help users understand their significance in the application setup.

By enhancing the documentation in these areas, it will improve the onboarding experience for new developers and reduce potential setup issues.