what's the best way to build a website onchain nowadays?

i need to migrate jesse.xyz and want something

I recommend you check out Arweave Name System (ArNS)

Site deployed permanently to Arweave and resolved to a permanent name that is accessible as subdomain of ~500 indenpedant gateways.

Imagine ENS + eth(dot)limo but there are hundreds of incentivised gateways vs one centralised one meaning your site cannot go down

Decentralised storage, naming and (importantly) access.

Can do this in one click using arlink.xyz (templates available at arlink.xyz/template) or roll your own solution using - docs.ar.io/guides/permaweb-deploy

Very happy to support on this but it's easy to do, same technical constraints as IPFS.