Build schlägt auf neuem Host fehl

[Falco]

@Samir_Faci

Unable to download data from https://rubygems.org/ - Net::OpenTimeout: execution expired

@Samir_Faci

A wget the rubygems works fine, internet connectivity is fine.

Wenn die Internetverbindung auf dem Host funktioniert, müssen Sie die Internetverbindung in Docker-Containern auf diesem Host debuggen.

Can't build container, no clear errors

The real problem is this one: If the server/container can’t access the Discourse source code in GitHub it won’t be able to build/update. Since you said it works on the host, you need to debug the container networking. Drop to a similar container shell with docker run --it debian:buster-slim bash and debug from there.