Added audio files for background music

[Rohanhacker]

Guidelines for creating Pull Requests

Thanks for contributing to the project. Please follow the guidelines below:

• Make sure you've read the Contributing guide.
• Describe how this PR will make our project even more awesome.
• If this solves an issue, please reference it in this PR.

[Rohanhacker]

As per discussion with @twishasaraiya added music files for main landing page

[twishasaraiya]

@Rohanhacker Please make a PR to develop branch.

[Rohanhacker]

@twishasaraiya done