[Feature] 404 page for the main site

[jbriones1]

Motivation behind the feature and what it will do

When users go to pages that don't exist the application defaults to the home screen. We should be redirecting them to a 404 page, but I haven't made one yet.

Which part of the application will this feature be for?

A new web page for the main site.

Minimal Viable Product

When the user tries to access a page that doesn't exist, there will be a 404 screen displayed in the router outlet.

Code changes

• Changing the catch-all route in app.routes.ts to route people to the 404 route.
• Create a 404 page component under src/app/pages/
• Add the 404 page as as registered application in application.ts

Additional context

I'm leaving this open to someone that wants to design the page, so feel free to request a graphic or get as creative as you can be with a 404 page.