ci: add full-node tests (#920)

diff --git a/flake.nix b/flake.nix
index a11b761..d00bebc 100644
--- a/flake.nix
+++ b/flake.nix
@@ -16,6 +16,9 @@
           devShell = pkgs.mkShell {
             buildInputs = with pkgs; [
               earthly
+              go
+              nixpkgs-fmt
+              poetry
               vendir
             ];
           };