Enhance the ui/ux look of the website

[Harish-2003]

you can see the website live at opentekhub.github.io/blockchain enhance the look by following the contribution guidelines

[vansh-codes]

I would like to work on this issue, please assign me

[SandhyaSankararaman]

Hi, I would like to work on this issue. Please assign it to me

[Harish-2003]

Make an pr

[IshuSinghSE]

Hello, I would like to work on this issue, assign me.

[Harish-2003]

Make an pr