Edge Runtime support for Adapter plugins

[thescientist13]

Type of Change

Feature

Summary

Coming out of #1008 , Greenwood now has support for the following serverless hosting providers

• feature/issue 1008 netlify adapter plugin #1128
• Feature/issue 1008 vercel adapter plugin #1139

With additional support coming soon for

• AWS Adapter plugin #1142
• Cloudflare Adapter plugin #1143

Most of these platforms also support edge runtimes, so for these and upcoming adapter plugins, so we will want to look into adding Edge support as well. Something to keep in mind though is reproducing the "edge" runtime locally, since there will be geographic and custom context only available at runtime on the hosting platform.

Details

Based on reading done so far, I think there will likely just need to be an option to opt-in per file (or maybe a top level project wide config?) to determine if something should run at the edge or not, e.g.

// src/api/greeting
export async function handler(request, context) {
  // ...
}

export const runtime = 'edge';

Integrating with local hosting platform CLIs would probably be super helpful here.

[thescientist13]

I'm thinking this may need / want to be a post 1.x feature? Not sure which is more important, more adapters, or deeper integration with current adapters? 🤔