Upgrade from within China fails due to git issues

[Falco]

@leoniscsem

I unfortunately do not understand how and where to set up the configuration, so that the pull processes of the Discourse launcher can use the proxy.

Install discourse with internet access only via proxy

This is possible, you need: Export http and https ENV variables in your current shell Add the same variables to the env block inside the containers/app.yml file Add the same variables to the docker system.d service config file (read system.d docs on this, you will need to create a new service file somewhere). After this, our official guide will work just fine.