Backend For Appointment (#84)

* Update About.js For Testing Porpose

* Update About.js

* Update Footer.js for testing porpose

* Update Footer.js

* updated the errorMiddleWare..

* Appointment Backend Work

* Resolved DB Connection conflict

* Resolved  conflict

* Delete backend/package-lock.json

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Co-authored-by: Chandan Kumal <85206406+chandan24042001s@users.noreply.github.com>