Updates index.html based on #278 proposal

[jawsgrant]

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⤴️ Summary

Per proposal in #278 updates index.html.
Removes duplication
Modifies structure of page

🌂 Related issues

Relates to #278

🙋 Acknowledging contributors

• All contributors to this pull request are already named in the table of contributors in the README file.
• The following people should be added to the table of contributors in the README file:
  • @jawsgrant for content

All requested changes made