[BUG]Crashed when using API routes as a proxy.

[炒米粉]

Describe the bug
Crashed when using API routes as a proxy like https://github.com/scottdixon/hydrogen-proxy-example.

To Reproduce
https://github.com/scottdixon/hydrogen-proxy-example

Screenshots

• Hydrogen version 1.6.6
• Node version 16.15.0

It looks like a bug of node-fetch, so I console the err then get:

node-fetch/node-fetch#1219

This bug has appeared since 2.6.8, and be fixed at 3.x(they said).
(2.6.7 is OK,I tried.)

So maybe the easiest way to solve this problem is to lock the version of node-fetch to 2.6.7.

Why do I need to use API routes as a proxy:
Shopify/hydrogen#1724