c3d2-web: fix telme10 startup

hosts/c3d2-web/default.nix

@@ -130,42 +130,46 @@ in
     language = "de";
   };
 
-  systemd.services = {
-    # lets agate access the tls certs
-    agate = {
-      requires = [ "agate-keys.service" ];
-      after = [ "agate-keys.service" ];
-      serviceConfig = {
-        Group = "keys";
+  systemd = {
+    packages = with pkgs; [ telme10 ];
+    services = {
+      # lets agate access the tls certs
+      agate = {
+        requires = [ "agate-keys.service" ];
+        after = [ "agate-keys.service" ];
+        serviceConfig = {
+          Group = "keys";
+        };
+      };
+      agate-keys = {
+        path = with pkgs; [ openssl ];
+        script =
+          let
+            stateDir = "/var/lib/agate/certificates";
+          in
+          ''
+            mkdir -p ${stateDir}
+            openssl x509 \
+                -in /var/lib/acme/www.c3d2.de/cert.pem \
+                -out ${stateDir}/cert.der \
+                -outform DER
+            openssl rsa \
+                -in /var/lib/acme/www.c3d2.de/key.pem \
+                -out ${stateDir}/key.der \
+                -outform DER
+            chown root:keys ${stateDir}/*
+            chmod 0640 ${stateDir}/*
+          '';
+        serviceConfig = {
+          Type = "oneshot";
+        };
+      };
+      telme10 = {
+        serviceConfig.AmbientCapabilities = "CAP_NET_BIND_SERVICE";
       };
     };
-    agate-keys = {
-      path = with pkgs; [ openssl ];
-      script =
-        let
-          stateDir = "/var/lib/agate/certificates";
-        in
-        ''
-          mkdir -p ${stateDir}
-          openssl x509 \
-              -in /var/lib/acme/www.c3d2.de/cert.pem \
-              -out ${stateDir}/cert.der \
-              -outform DER
-          openssl rsa \
-              -in /var/lib/acme/www.c3d2.de/key.pem \
-              -out ${stateDir}/key.der \
-              -outform DER
-          chown root:keys ${stateDir}/*
-          chmod 0640 ${stateDir}/*
-        '';
-      serviceConfig = {
-        Type = "oneshot";
-      };
-    };
-    telm10 = {
-      path = with pkgs; [ telme10 ];
-      serviceConfig.AmbientCapabilities = "CAP_NET_BIND_SERVICE";
-    };
+
+    sockets.telme10.wantedBy = [ "sockets.target" ];
   };
 
   users = {