Digital Ocean basically lets you run something called a droplet in the cloud. It’s a general purpose server more or less. Put nginx on it, start the server process, configure the DNS rules, and congrats you have a site that says hello world.
A droplet is similar to an EC2 on Amazon Web Services. I found DOCN to be cheaper than AWS when I hosted my site there. I was going to also suggest proton and DOCN might work for your use case. You get the redundancy and uptime without needing to use your own hardware, electricity, or bandwidth.
And misses others you didn’t think about.