updated deploy instructions

src/mailsrv/docs/Deploy.md

@@ -64,10 +64,10 @@ Then exit and relogin to refresh the bash hash
 
 ```
 acme.sh --issue --alpn --pre-hook 'systemctl stop haproxy' \
-        --post-hook 'systemctl start haproxy' -d mailtest.alemor.org
-acme.sh --install-cert -d mailtest.alemor.org \
+        --post-hook 'systemctl start haproxy' -d mail.alemor.org
+acme.sh --install-cert -d mail.alemor.org \
         --fullchain-file /srv/vol/mailsrv/ssl/fullchain.pem \
-        --key-file /srv/vol/mailsrv/ssl/key.pem
+        --key-file /srv/vol/mailsrv/ssl/privkey.pem
 ```
 
 ## make users and aliases