@GregorTacTac If you use containers you can map something like 8080 on the host to 80 in the container. Generally it's recommended to have a reverse proxy listening on 80 and 443 with all your individual applications on localhost only high ports.

@reactive_recall Those fees come from the banks and card schemes, so every processor out there is going to pass them on. The only real way around it is to accept payments by bank transfer or cheque/postal order.