I just have installed a new nextcloudpi on my raspberry pi 4 with success. I now want to use another port 81 instead of 80 for access and letsenrypt for instance (my router itself uses port 80 for some services). But I failed in order to reconfigure the settings ()apache), plus in the websettings I can only read port 80 everywhere.
Can someone tell me what I only have to change in order to change the port 80 to 81?
Thany you very much,