Updated documentation

[technologic-technologic]

Upgraded the README.md to apply to current's app state.

[github-actions]

PR Summary

WHAT Changed

• Updated the README.md file to improve clarity and usability descriptions.
• Changed the phrasing to enhance readability and corrected minor grammatical issues.
• Modified the section title from "Backend API (Expected)" to "Backend API (Expected communications)".
• Updated instructions for running the application and tests.

WHY It Matters

• Enhances the documentation for better understanding and usability for new developers and users.
• Clarifies the expected communications with the backend API, which is crucial for integration.
• Provides clearer instructions for running the application and tests, reducing potential confusion.

RISKS

• Minimal risk as changes are documentation-related; however, incorrect instructions could lead to confusion for new users.

TESTS to Add

• No new tests are required as this PR only modifies documentation.

BREAKING CHANGES

• No breaking changes introduced.

Changed File Paths

• README.md