[GSoC]Feature Request: Handle the incoming Images, and uploading images.

[Ayush0Chaudhary]

Is your feature request related to a problem? Please describe.
Currently we use a single url, which is hosted on previous participant github, we are not really fetching the photos from servers, so after this issue, the post will be able to show photos which the user actually attached

Describe the solution you'd like
in talawa-api the solution is already in place, we are storing the images in file form

Additional context
I will remove the carousel as we are focusing on the MVP right now. Also videos will also be handled in another PR.

Potential internship candidates
Please read this if you are planning to apply for a Palisadoes Foundation internship #359
yes

[github-actions]

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