Vercel
vercel.json, and why none of the framework machinery applies
"framework": null matters. Vercel's detection looks for a package.json and,
finding none, will otherwise guess — and a wrong guess produces a build that
fails in a way that reads as sqzass's fault.
Preview deployments
Vercel exposes the preview host as $VERCEL_URL, without a scheme:
Same reasoning as everywhere else: internal links are root-absolute and work regardless, but canonical, the sitemap and social tags are absolute and would otherwise announce production from a preview.
Trailing slashes
sqzass writes /start/index.html, so /start/ is the canonical form and every
link it generates uses it. Vercel's default trailingSlash behaviour redirects
between the two, which costs a hop on links written by hand as /start. Setting
"trailingSlash": true removes the hop.
This is a preference, not a requirement — the site is correct either way.
What this does not need
No serverless functions, no ISR, no edge config, no image optimisation. sqzass has nothing to run at request time, so the parts of Vercel that distinguish it from a file server are all inert here.
That is worth saying plainly: if Vercel is where your team already deploys, this works. If you are choosing a host for a sqzass site, the reason to pick one over another is not going to be its framework support.