Routing in app built by adapter-static is broken in next.266

Describe the bug

Since upgrading to the latest version of SvelteKit a site which is compiled with the static adapter no longer works when served via Nginx.

For example routing to https://mywebsite.com works but routing to https://mywebsite.com/hello results in 404. If I were to navigate to the second link internally via an <a> the 404 would not appear. I can resolve the issue by pinning the SvelteKit version to something like 250 but being on the HEAD manifests the error.

Reproduction

1. Build any site with static adapter and SvelteKit version 266
2. Host output with a web server such as nginx
3. Route to anything except index.html directly or navigate there and refresh. For example https//mysite.com/anotherpage

Logs

No response

System Info

System:
    OS: macOS 12.2
    CPU: (8) arm64 Apple M1
    Memory: 553.13 MB / 16.00 GB
    Shell: 3.3.1 - /opt/homebrew/bin/fish
  Binaries:
    Node: 17.4.0 - /opt/homebrew/bin/node
    Yarn: 1.22.10 - /opt/homebrew/bin/yarn
    npm: 8.3.1 - /opt/homebrew/bin/npm
  Browsers:
    Brave Browser: 96.1.32.115
    Chrome: 98.0.4758.80
    Firefox: 97.0
    Safari: 15.3
  npmPackages:
    @sveltejs/adapter-static: next => 1.0.0-next.28 
    @sveltejs/kit: next => 1.0.0-next.266 
    svelte: ^3.46.4 => 3.46.4

Severity

serious, but I can work around it

Additional Information

No response

[benmccann]

Please take a look at trailingSlash: 'always': https://kit.svelte.dev/docs/configuration#trailingslash

If you set that option it will generate index.html files for you and I think it should address this issue

[frederikhors]

I’m on "@sveltejs/kit": "1.0.0-next.278" with "@sveltejs/adapter-static": "1.0.0-next.28" and with default trailingSlash (never).

I have this in (the default for new demo init project) app.html:

<link rel="icon" href="%svelte.assets%/images/icons/favicon.png" />

The issues in my case are:

1. on each navigation SvelteKit requests the favicon
2. until some SvelteKit version ago the request had a correct path (http://localhost:3000/images/icons/favicon.png) now instead the path is wrong based on which route I’m in, example: http://localhost:3000/users/images/icons/favicon.png or http://localhost:3000/players/images/icons/favicon.png.

If I use trailingSlash: "always" the generated .html is empty! 0 KB!