#161541575 Add changes to landing page.

[RonKbS]

What does this PR do?

Adds changes to existing landing page and navbar to be displayed on navigating to the main URL.

Description of Task to be completed?

Currently, the landing page requires changes for a better user interface.
This PR adds those changes.

How should this be manually tested?

Pull the changes on a new branch based off of the develop branch and run npm start.
Access http://localhost:3000 and the page will be rendered.

Background context?

N/A

What are the relevant pivotal tracker stories?

161541575

Checklist: I completed these to help reviewers

• My IDE is configured to follow the ESlint Conventions

  No? Unsure? -> configure your IDE, format the code and add the changes with git add . && git commit --amend

• I have added tests to cover my changes.

  No? -> write tests and add them to this commit git add . && git commit --amend

• All new and existing tests passed.

  No? -> figure out why and add the fix to your commit. It is your responsibility to make sure your code works.

• My pull request is based on the latest changes of the develop branch.

  No? Unsure? -> execute command git pull --rebase origin develop

[coveralls]

Pull Request Test Coverage Report for Build 94

• 3 of 3 (100.0%) changed or added relevant lines in 3 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 100.0%

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Totals
Change from base Build 73:	0.0%
Covered Lines:	19
Relevant Lines:	19

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💛 - Coveralls