Docker routes container traffic in the nat table, which means that packets are diverted before it reaches the INPUT and OUTPUT chains that ufw uses. Packets are routed before the firewall rules can be applied, effectively ignoring your firewall configuration.

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[–] MangoPenguin@lemmy.blahaj.zone 5 points 5 days ago

The only thing I really have to make sure of is that the deployment environment has node and the angular CLI installed

That's why Docker is popular. Making sure every single system running your app has the correct versions of node and angular installed is a royal pain in the butt.