start refactoring shared code into modules, update the lock, do some other minor fixes

modules/nixos/shared-packages/server-settings/roundcube/default.nix

@@ -0,0 +1,39 @@
+{
+  config,
+  pkgs,
+  ...
+}: {
+  # TODO: Figure out how to create packages for some plugins for roundcube!
+  # https://packagist.org/search/?query=roundcube
+  # https://discourse.nixos.org/t/roundcube-with-plugins/28292/7
+  services.roundcube = {
+    enable = true;
+    package = pkgs.roundcube.withPlugins (
+      plugins: [
+        plugins.contextmenu
+        plugins.carddav
+        plugins.custom_from
+        plugins.persistent_login
+        plugins.thunderbird_labels
+      ]
+    );
+    plugins = [
+      "contextmenu"
+      "carddav"
+      "custom_from"
+      "persistent_login"
+      "thunderbird_labels"
+    ];
+
+    # this is the url of the vhost, not necessarily the same as the fqdn of
+    # the mailserver
+    hostName = "webmail.lillianviolet.dev";
+    extraConfig = ''
+      # starttls needed for authentication, so the fqdn required to match
+      # the certificate
+      $config['smtp_server'] = "tls://${config.mailserver.fqdn}";
+      $config['smtp_user'] = "%u";
+      $config['smtp_pass'] = "%p";
+    '';
+  };
+}