Fixed some severe bugs and refactored the whole codebase

[kumartul]

• Altered the styling a little bit so that the user can see the whole container
• Removed unused packages, parameters, variables, etc.
• Added a feature that if any user hits a page that doesn't exist, he/she will be redirected to the error page
• Mark all the input fields as 'required' so that the user must enter a value
• Fixed some severe bugs in src/routes/top.js and src/utils/fetchTrending.js. Now that page is running perfectly...
• Fixed some severe bugs in src/routes/badge.js. Now that page is also running perfectly...
• Refactored the whole codebase, used some better algorithms, removed unnecessary code, and simplified some stuff