add qemu testing to flake

flake.nix

@@ -66,6 +66,22 @@
         };
         });
 
+        apps = forAllSystems (system:
+        let
+          pkgs = nixpkgsFor.x86_64-linux;
+          iso = self.packages.x86_64-linux.boot-env-iso;
+        in
+        {
+          test-iso-x86_64 = {
+            type = "app";
+            program = "${pkgs.writeScriptBin "test-iso" ''
+              #!/bin/sh
+              ${pkgs.qemu}/bin/qemu-system-x86_64 -cdrom ${iso}/iso/*.iso -m 1G \
+                -net nic,model=rtl8139 -net user,hostfwd=tcp::8080-:8080
+            ''}/bin/test-iso";
+          };
+        });
+
         devShells = forAllSystems (system:
           let
             pkgs = nixpkgsFor.${system};