Update Readme

[arghadipmanna101]

will add photos
will add gif
will stylize the readme
will update how to contribute
Will add contributors name in Readme file.

[arghadipmanna101]

please assign me under Apertre

[abhraneel2004]

I am interested to work in this issue.
What I will add:

• screenshots of the app (demo)
• add some emojis in correct places to engage the readers
• will give learning resources of the technology used
• will add the contributor name and photo