[Frontend] Implement private route

[amlannandy]

Is your feature request related to a problem? Please describe.
Currently in the react app, you can access routes such as home even without being authenticated which is not ideal. Such routes should be protected and can also be accessed when authenticated.

Describe the solution you'd like
N/A

Describe alternatives you've considered
N/A

Additional context
I'll soon submit a PR for this.