add dig, prepare ssh for custom options

configuration.nix

@@ -134,6 +134,7 @@
     gnupg
     ncdu
     whois
+    dig
     nodejs_20
     # PROGRAMS
     obsidian
@@ -159,6 +160,9 @@
   # enable git
   programs.git.enable = true;
 
+  # SSH settings
+  programs.ssh.extraConfig = "";
+
   # Some programs need SUID wrappers, can be configured further or are
   # started in user sessions.
   # programs.mtr.enable = true;