I'm primarily an iOS developer and wanted to start learning web development so I built two really simple sites:

http://pointillism.digitalbunker.dev/: I've always been into generative art, so I built this site that takes a source image and recreates it in a Pointillism style

http://gitrandom.digitalbunker.dev/ : Generally when I'm struggling to come up with project ideas, I'll just browse GitHub. This site lets you explore random GitHub projects by language and topic.

I built the sites using Vapor, so I could continue to use Swift and just learn one new thing at a time.

I'm probably going to pick up some iOS app too to leverage the new hobbies people are discovering being at home (i.e. bread making).