Badge

[blaggacao]

[![Devshell Dev Environment](https://img.shields.io/badge/nix-devshell-success?logo=NixOS)](github.com/numtide/devshell)

Maybe users want to label their repository as supporting devshell development environments. Should it be blue?

[blaggacao]

[![Devshell Dev Environment](https://img.shields.io/badge/nix-devshell-blue?logo=NixOS&labelColor=ccc)](github.com/numtide/devshell)

[zimbatm]

nice :)

[zimbatm]

The green and blue don't mix well together in the first one so my choice would be on option (2). But I like the dark background on the nix side in the first one better.

[zimbatm]

thanks for your ideas. I added the second badge to the README