Add rev to ldflags

flake.nix

@@ -43,6 +43,7 @@
                   )
                 )) 2
               );
+              rev = self.rev or "";
               geoDb = pkgs.fetchFromGitHub {
                 owner = "geoacumen";
                 repo = "geoacumen-country";
@@ -74,6 +75,7 @@
                 cp -r ${frontend}/* web/frontend/dist
               '';
               vendorHash = "sha256-griWN9fQ0X2ClPDOzVXV80MpdcEFZfe/WaYm7L7fAc8=";
+              ldflags = [ "-X git.t-juice.club/torjus/apiary.Build=${rev}" ];
               tags = [
                 "embed"
               ];