Using fetch inside endpoints with Astro v2.0.2 and node.js adapter

C.f. bug report in astro's repository.

About this repository

Contains an Astro "Basics" starter kit installation updated to reproduce the reported bug.

How to reproduce the bug

Running in node.js v16

Steps

git clone git@github.com:mef/astro-fetch-in-endpoint-issue.git
cd astro-fetch-in-endpoint-issue
npm install
npm run build; npm run preview

Expected result

Preview server starts

Observed result

Process crashes with the following error message:

const response = await fetch('https://www.mediawiki.org/w/api.php?action=opensearch&search=example');
	                 ^

ReferenceError: fetch is not defined