If you see your Docker container ports got exposed and bypassed all UFW rules, that is normal because Docker will manipulate iptables when creating container. Docker in default will work with iptables nicely without user creating complicated iptables rules. If you don’t want Docker creating iptables rules or you are using UFW, you need to propertly configure them to make then work nicely together.
Isso is an open source comment system similar to Disqus and other paid comment systems, but without using heavy third party script that contain tracking and analystic functions. It use SQLite3 database to store comments since comments take very litttle space.
If you need help installing Docker on your Raspberry Pi, be sure you pick the guide wisely. Some guides online won’t work on Raspberry Pi. The following steps had been tested on Raspberry Pi 4.