Documentation incorrectly specifies all options as optional

[frederikhors]

Describe the bug
Commenting out adapter: prop in svelte.config.cjs throws error:

> Using undefined
> adapt is not a function
TypeError: adapt is not a function
    at adapt (file:///C:/kit/node_modules/@sveltejs/kit/dist/chunks/index6.js:768:8)
    at file:///C:/kit/node_modules/@sveltejs/kit/dist/cli.js:633:11

Expected behavior
I read https://kit.svelte.dev/docs#configuration:

All values are optional.

Information about your SvelteKit Installation:

Diagnostics

• The output of npx envinfo --system --npmPackages svelte,@sveltejs/kit,vite --binaries --browsers:

System:
OS: Windows 10 10.0.19042
Binaries:
Node: 14.16.0 - C:\Program Files\nodejs\node.EXE
npm: 7.8.0 - C:\Program Files\nodejs\npm.CMD
npmPackages:
@sveltejs/kit: 1.0.0-next.70 => 1.0.0-next.70
svelte: 3.37.0 => 3.37.0
vite: 2.1.5 => 2.1.5

• Your adapter: Nothing

Additional context
I need a way to build my project as if I were using the sveltejs/template seed.

[ignatiusmb]

All options are indeed optional, you'll need to read more for each of the options, in this case https://kit.svelte.dev/docs#configuration-adapter and https://kit.svelte.dev/docs#adapters.