This looks quite good. There's a very minor typo in the text on the front page, s/comming/coming/.
In American English and the Queen's English, "I don't have IPv6, how to access my node?" is bad grammar and should be "I don't have IPv6, how do I access my node?". As a German selling things in Euro, you are clearly using International English and are free to make your own rules - (I do see this sentence structure a lot with non-native speakers). If that is the standard, us Americans will happily mind our own business. Not sure about the Brits.