Add a 404 error / search results not found page

[tjdev7]

Feature request

Suggest an idea for this project
Add a 404 page to the app and a message for when results are not found on a page

Is your feature request related to a problem? Please describe.
Currently, the app does not show a message if there are no pictures are found for a specific search query.

Describe the solution you'd like
Add a simple ternary operator to the search query to show a "No results found" message

Describe alternatives you've considered
N/A

Additional context
N/A