Is there any simple way, a console command or such, to force the docker to reconnect the VPN?
No, it doesnt work with PIA only. In the docker settings theres "VPN_PROV" where you can choose PIA, AirVPN or custom. I'm using custom with Mullvad VPN without problems.
Is it just me or is the letsencrypt docker missing a bunch of folders and files? I just installed it and I dont have the proxy.conf file as well as the whole proxy-conf folder with all the samples? Though it seems noone else is missing them, so i wonder if its something wrong on my part?