Web design improved, database added

[OriKaplan0]

index.html changes:

• Added score boxes.
• Added game menu.
  game.css changes:
• Added new styling for the page.
• Added a game menu styling.
• Score boxes styled.

score.js file added:

• Fetched the data from a json file to show and write the scores.
  server/

game.py changes:

• Added write_json function to update the score and write it into the json.

[sleviim]

Hi Ori,
Thanks for the PR!
For best results and reviews, please split your PR into smaller pieces (like each bulletin in a different PR).
Also, please share screenshots for the final visualization so we can compare it with the improved look.
You can upload your pictures here: https://imgur.com/ and share the link on the commit message.

[sleviim]

@OriKaplan0 Can you please split to smaller PRs?