https://motherfuckingwebsite.com/ If it’s just text, you can probably make a static HTML website and accomplish your goals. I’m not sure what format it’s in now but Markdown is what I use and then just export to HTML.

If you just want to host epub (or equivalent files), you can still make a static page and link to them with Cloudflare Pages, GitHub.io, or one of many free static page hosting sites.

Is it transactional emails, one-to-many, or like a message board where people get email notifications? I’m not sure I’ll have a good answer but I suspect that context would change some answers.

I’m gonna play devil’s advocate here.

You should play around with it. But I’ve been a Linux server admin for a long time and — this might be unpopular — I think Docker is unimportant for your situation. I use Docker daily at work and I love it. But I didn’t bother with it for my home server. I’ll never need to scale it or deploy anything repeatedly or where I need 100% uptime.

At home, I tend to try out new things and my old docker-compose files are just not that valuable. Docker is amazing at work where I have different use cases but it mostly just adds needless complexity on a home server.

Those famous good guys we all know and love.

I don’t think it matters but I usually pick Ubuntu as the base for my server(s) just because I tend to always go back to an Ubuntu spin as my daily driver. It’s better to just have it be the same.