add notification for screenshot

systems/pc/configuration.nix

@@ -105,6 +105,17 @@
   };
   services.jenkins.enable = false;
   virtualisation.waydroid.enable = false;
+  
+  services.postgresql = {
+    enable = true;
+    ensureDatabases = [ "mydatabase" ];
+    extensions = with pkgs.postgresql14Packages; [ pg_libversion ];
+    authentication = pkgs.lib.mkOverride 10 ''
+      #TYPE  DATABASE   USER    ADDRESS        METHOD
+      local all         all                    trust
+      host  all         all     127.0.0.1/32   trust
+    '';
+  };
 
   systemd.user.services.scheibnkleister-presence = {
     description = "scheibnkleister-presence";