Amazon/Google/Oracle free tiers should be good for a small project. It does include an IPv4.
https://aws.amazon.com/free/free-tier-faqs/
https://cloud.google.com/free/docs/free-cloud-features#compu...
https://aws.amazon.com/free/free-tier-faqs/
https://cloud.google.com/free/docs/free-cloud-features#compu...
https://aws.amazon.com/blogs/aws/new-aws-public-ipv4-address...
Do take a look at the other clouds, Oracle in particular offers an ARM VM with 24 GB of memory for free which is interesting for some workloads.
I have website served through S3 and Route53. Seems to only cost 50 cents per month per site, plus the $12 per year per site for the domain.