[nix,flake] Moves some container files around. Also updates the flake lock. [synapse] Gets the federation working

system/hosts/mcp/configuration.nix

@@ -96,7 +96,8 @@
     port = 5000;
     openFirewall = true;
     # Bind to the podman network so Traefik can route to it.
-    # Note that it may fail to start if this network has not been created yet.
+    # Note that it may fail to start if this network has not been created yet,
+    # so this has to be manually restarted when the system boots.
     listenAddress = "10.88.0.1";
   };
 
@@ -107,8 +108,10 @@
         enabledCollectors = [ "systemd" ];
         port = 9002;
         # Open the firewall, but only listen on the internal address
-        # TODO: Add some form authentication
         openFirewall = true;
+        # Bind to the podman network so Traefik can route to it.
+        # Note that it may fail to start if this network has not been created yet,
+        # so this has to be manually restarted when the system boots.
         listenAddress = "10.88.0.1";
       };
     };