Refactor index.js for improved functionality

Refactor video processing and error handling

Update index.js

Update index.js

Implement downloadToFile function for file downloads

Implement retry logic for Supabase uploads

Refactor Supabase environment variable handling

Add undici as a dependency in package.json

Set global dispatcher for undici with IPv4

Refactor upload process with error handling

Update video processing to use public URL

Update index.js

Update Dockerfile to copy index.js instead of src

Update package.json

Initialize Express server with Supabase integration