Create High-Fidelity Prototypes in Sketch, XD, or Figma, and Export HTML

Replace Cover is a little tool that enables anyone to create consistent cover arts for their Spotify playlists. Works with other music services too. Backstory: I'm a product designer who wanted to learn React.js, so I spent some evenings & a couple weekends learning, building & shipping this app over the course of 10 days. Should designers code?