Set Up AWS S3 for File Storage

[tsahil01]

• Description: Configure AWS S3 for uploading and managing video/audio files.
  • Tasks:
    • [x] Install AWS SDK with npm install aws-sdk.
    • [x] Configure AWS credentials in .env for access to S3.
    • [x] Set up a helper function for uploading files to S3 in a utility file.
    • [x] Test file upload by creating a simple upload form and API endpoint (/api/uploadVideo).