Disabling prerendering breaks runtime on 1.0.0-next.208 using latest adapter-node

[pheuter]

Describe the bug

Setting prerender: { enabled: false } in svelte.config.js causes svelte-kit build to no longer generate a build/prerendered directory, which throws this error during runtime:

Error: ENOENT: no such file or directory, scandir 'apps/v2/build/prerendered'
@careswitch/v2-app:preview:     at readdirSync (node:fs:1392:3)
@careswitch/v2-app:preview:     at list (file://apps/v2/build/handler-2aa2c439.js:57:12)

Reproduction

Any Svelte Kit app on 1.0.0-next.208 with @sveltejs/adapter-node: 1.0.0-next.57 and prerender: { enabled: false }, set in svelte.config.js.

Logs

No response

System Info

System:
    OS: macOS 12.1
    CPU: (10) arm64 Apple M1 Max
    Memory: 5.05 GB / 32.00 GB
    Shell: 5.8 - /bin/zsh
  Binaries:
    Node: 17.3.0 - ~/.nvm/versions/node/v17.3.0/bin/node
    npm: 8.3.0 - ~/.nvm/versions/node/v17.3.0/bin/npm
  Browsers:
    Chrome: 96.0.4664.110
    Safari: 15.2
  npmPackages:
    @sveltejs/adapter-node: 1.0.0-next.57 => 1.0.0-next.57 
    @sveltejs/kit: 1.0.0-next.208 => 1.0.0-next.208 
    svelte: 3.44.3 => 3.44.3 

Severity

serious, but I can work around it

Additional Information

The workaround I'm currently doing is a manual mkdir -p build/prerendered after sveltekit build.

[benmccann]

kit/packages/adapter-node/src/middlewares.js

Line 23 in 6221e6a

export const prerenderedMiddleware = fs.existsSync(paths.prerendered)

changed to

kit/packages/adapter-node/src/handler.js

Line 33 in a1e980f

const serve_prerendered = sirv(path.join(__dirname, '/prerendered'), {