Way to utilize iCloud shared album externally
You can make albums, share links and make the albums public on macOS. 

On iOS:
Create a "New Shared Album" and turn on "Public Website" in People's tab in the album itself, not the global one. 


  You can even share albums with friends and family who don't use iCloud. Just open a Shared Album that you created, go to the People tab on your iOS device or click the people icon on your Mac, and turn on Public Website. Your photos publish to a website that anyone can see in an up-to-date web browser. 


https://support.apple.com/en-in/HT202786