Add description field to function-schema

clanModules/zt-tcp-relay/README.md

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+---

clanModules/zt-tcp-relay/default.nix

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+{
+  pkgs,
+  lib,
+  config,
+  ...
+}:
+{
+  options.clan.zt-tcp-relay = {
+    port = lib.mkOption {
+      type = lib.types.port;
+      default = 4443;
+      description = "Port to listen on";
+    };
+  };
+  config = {
+    networking.firewall.allowedTCPPorts = [ config.clan.zt-tcp-relay.port ];
+
+    systemd.services.zt-tcp-relay = {
+      wantedBy = [ "multi-user.target" ];
+      after = [ "network.target" ];
+      serviceConfig = {
+        ExecStart = "${
+          pkgs.callPackage ../pkgs/zt-tcp-relay { }
+        }/bin/zt-tcp-relay --listen [::]:${builtins.toString config.clan.zt-tcp-relay.port}";
+        Restart = "always";
+        RestartSec = "5";
+        dynamicUsers = true;
+      };
+    };
+  };
+}