Fixing "FileNotFound" error

This should fix the "FileNotFound" error experienced by some users when the registry has data corruption. Please test and let me know if it works as expected.

Added Bearer token authentication support (eg. Harbor)

This should now work with token based authentication. Has been tested working on Harbor.

Added S3 and authentication support

This should now support registries using S3 as a backend, and now also supports authentication.

Manifest lists now supported

Manifest lists supported, thanks to @joniw

Optimized script run speed

• Optimized script run speed
• Changed to alpine based image

Fixed error introduced in last release

Fixed error introduced in the last release that caused the script to not do anything (other than fail).

Fixed same manifest in multiple repos

Fixed same manifest in multiple repos

Fixed insecure curl

Merge pull request #3 from MaximilianMeister/curl-insecure

fix insecure curl