Configure Rails API

[lily4178993]

Description:

This PR introduces several enhancements and setup configurations to the hello-rails application. It focuses on database setup, API endpoint additions, testing improvements, linting workflow integration, CORS middleware configuration, and README updates.

Changes Made:

• Updated database configuration to use PostgreSQL.
• Added migration and schema for the messages table.
• Implemented MessagesController and Message model with seed data.
• Corrected capitalization of the greeting method in MessagesController.
• Added an API endpoint for the greeting message.
• Removed unused test files and the test_helper.rb.
• Added a linters workflow for Rubocop and node_modules checker.
• Included .rubocop.yml and updated the Gemfile with the Rubocop gem.
• Fixed Rubocop linter errors.
• Added the MIT License.
• Updated README with project details and setup instructions.
• Added the rspec-rails gem and configured spec files.
• Added MessagesController spec for the greeting endpoint.
• Updated the test suite setup.
• Modified Rails environment check in rails_helper.rb.
• Added rack-cors gem and configured CORS middleware.
• Updated README.md with the project description and a link to the "Hello React" app.

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Link to the pull request in React app

Kindly review the changes and share your feedback.

[Omar-Muhamad]

Approved ✔

Hi @lily4178993,

Great job, Your project is complete! There is nothing else to say other than... it's time to merge it

Congratulations! 🎉

(Highlights) Good Points: 👍

• Your work is well documented. ✔
• The correct workflow is used. ✔
• All linters checks are ok. ✔

(Changes Required) Aspects to improve: ♻️

• N/A

[Optional] suggestions:

• N/A

Every comment with the [OPTIONAL] prefix is not crucial enough to stop the approval of this PR. However, I strongly recommend you to take them into account as they can make your code better.

**Cheers and Happy coding!👏👏👏

Feel free to leave any questions or comments in the PR thread if something is not 100% clear, and please remember to tag me in your question so I can receive the notification**

Please, do not open a new Pull Request for re-reviews. You should use the same Pull Request submitted for the first review, either valid or invalid unless it is requested otherwise.

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