Add postman

home.nix

@@ -18,6 +18,7 @@
     ./programs/git.nix
     ./programs/libreoffice.nix
     ./programs/nvim.nix
+    ./programs/postman.nix
     ./wm/rofi.nix
     ./wm/cursor.nix
     ./wm/dconf.nix

programs/postman.nix

@@ -0,0 +1,7 @@
+{ pkgs, ... }:
+
+{
+  home.packages = with pkgs; [
+    postman
+  ];
+}