What software or tool do you use in https://hub.logseq.com/ and discuss.logseq.com?

I like hub and I would like to use the same tools in my incubook.com site. Is it opensource? Need to install app in my server?

https://discuss.logseq.com uses Discourse and https://hub.logseq.com uses Nuxt. Both are open-source.

I would give Nextra and Publii a look.