fix: fixing bug if session is not defined

See merge request !49

in javascript file

for get value of isAdmin session

db: update database

See merge request if3110-2023-01-j/if-3110-2023-01-j!48

feat: add screenshot of database structure

feat: add screenshot of pages I made

See merge request if3110-2023-01-j/if-3110-2023-01-j!47

style: styling main

See merge request if3110-2023-01-j/if-3110-2023-01-j!46

- delete unused
- style challenge and dashboard

style: fix styling error on commited files

See merge request if3110-2023-01-j/if-3110-2023-01-j!45

Make responsive page for the page I made

See merge request if3110-2023-01-j/if-3110-2023-01-j!44

fixing html Hall-of-Fame bug

See merge request if3110-2023-01-j/if-3110-2023-01-j!43

Challenge

See merge request if3110-2023-01-j/if-3110-2023-01-j!42

db: update database for testing

See merge request if3110-2023-01-j/if-3110-2023-01-j!41

feat: add most random 404 page

See merge request if3110-2023-01-j/if-3110-2023-01-j!40

fix: bug when user spamming button

See merge request if3110-2023-01-j/if-3110-2023-01-j!39