server {
    listen 3000;
    root /usr/share/nginx/html;
    index index.html;

    location / {
        # adapter-static writes prerendered routes as flat <route>.html
        # files (e.g. /dashboards -> dashboards.html, confirmed by
        # actually inspecting the build output), not <route>/index.html --
        # $uri.html has to be in this chain or a request for exactly
        # "/dashboards" falls straight through to the SPA fallback and
        # skips the prerendered page it should be serving. 200.html (not
        # index.html) is the fallback shell for genuinely dynamic routes
        # (dashboards/[id] etc.) -- named differently so it doesn't
        # collide with "/" -> index.html, which really is prerendered.
        try_files $uri $uri.html $uri/ /200.html;
    }
}