How can I contribute processing power to the community?

Hello folks,

I have a mini PC which I use to host my website and some lightweight services. The mini PC idles at ~10% cpu usage. I was wondering if I can contribute 90% of CPU to the community. Thinking that maybe I can host other people's websites for free.

How can I do that? Should I host some fediverse software? What do I do with this much processing power?

Thanks in advance!