I can't start a Discourse

[Jagster (Jakke Flemming)]

Try this:

Configure a firewall for Discourse

If you are using a standard Docker based Discourse install, the following Uncomplicated Firewall rules will protect any non-Docker services on your server: ufw allow http ufw allow https ufw allow ssh ufw enable That is, allow HTTP (port 80), HTTPS (port 443), and SSH (port 22), and nothing else. Note: Docker manipulates iptables directly and bypasses ufw rules. This means ufw cannot block or restrict access to ports exposed by Docker containers (ports 80 and 443 in a standard Disc…

If it doesn’t help then you know the issue may be docker itself.