added closing button

[Nupur19nj]

Fixes #(issue number)

  Fixes #582

Describe the changes you've made

I have added closing button which takes back to the home page.

Deploy your changes to github page or netlify and mention deployment link:

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Describe if there is any unusual behaviour of your code(Write NA if there isn't)

A clear and concise description of it.

Additional context (OPTIONAL)

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Test plan (OPTIONAL)

A good test plan should give instructions that someone else can easily follow. How someone can test your code?

Checklist

• [x] I have mentioned related issue number in PR description.
• [x] I have added screenshots and related demo links of my changes..
• [x] The title of my pull request is a short description of the requested changes.
• [x] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [ ] Open Source Program names(OPTIONAL: If you participated in any open-source program then please mention the program name here)