wildduck: Clean up configs

wildduck/README.md

@@ -22,3 +22,10 @@ The mail stack consists of several moving parts:
 Outside Kubernetes there is NAT rule on the Mikrotik router
 which rewrites source IP of any TCP port 25 headed traffic to
 originate from the IP address of the mail exchange.
+
+TODO: Figure out how to automate DH parameters generation:
+
+```
+openssl dhparam -out dhparams.pem 2048
+kubectl create secret generic -n wildduck dhparams --from-file=dhparams.pem
+```