Move most Nginx proxies to the individual services

nixos/server/mailserver.nix

@@ -50,5 +50,15 @@ in rec {
 
     # Force the mailserver to use a different redis port
     redis.servers.rspamd.port = 1515;
+
+    # The hostname mail ports use
+    nginx.virtualHosts."mx.${secrets.jimDomain}" =  {
+      enableACME = true;
+      forceSSL = true;
+      locations."/" = {
+        proxyPass = "http://127.0.0.1:1390";
+        proxyWebsockets = true;
+      };
+    };
   };
 }