Support for online FilesCollection

[Flowtter]

• add support for aws S3 bucket to store files
  • upload file on the bucket
  • retrieve file on the bucket
  • delete file
• add support for a Content delivery network
  • retrieve file of the bucket using a CDN

[ramnes]

Just adding that the overall point of using S3 to store files is to make lemverse stateless so that it's easier to scale horizontally. :)

[Donorhan]

Thanks for your contribution, it will be useful to many people I think 🙂

(I left a comment but everything looks great to me! If you don't think it's necessary, I'll merge the PR)

[Flowtter]

I'll have a look soon!

[Donorhan]

Thanks! 🙏🏻