Add usage example in readme

[bossvip]

@arilotter thanks for building this flake. After struggling with nix a bit, I realized we need to add nodejs, yarn and rustup with the stable toolchain. I'm posting an update to the readme that illustrates how to use your flake.

[arilotter]

hmmm, while node and yarn make sense to me for Anchor, not sure why we need Rustup. What do you need that for?

[bossvip]

anchor build would not work without the stable toolchain. I'm running NixOS where rustup or rust is not globally present. anchor build would try searching for rustup and fail. After adding rustup, I had to run a shell command rustup default stable to make anchor work.

[arilotter]

anchor build would not work without the stable toolchain. I'm running NixOS where rustup or rust is not globally present. anchor build would try searching for rustup and fail. After adding rustup, I had to run a shell command rustup default stable to make anchor work.

got it , sounds like a bug. I'll check it out.