Improve design for api, docs and blogs pages

[ShubhamOulkar]

Demo:

design preview

This is a minor redesign improves the Express.js website’s UI and usability across both dark and light modes. The update includes navbar, layout, spacing, color, and typography tweaks to create a more modern and consistent look.

Task to do

• Fix Content Overflow on API Pages for Mobile Devices #1831 || fix: content overflow on small screen  #1948
• Reduce the number of links in the menu. #1780
• Increase the font size #1755
• Increase the space between the lines #1754
• audit website for accessibility issues #1753
• (a11y) -- menu is broken at higher zoom levels #1731
• Make full size nav breakpoint max of 960px #1704

Please review and share your feedback! I’m open to making further improvements as needed.

cc @jonchurch, @bjohansebas