Generic Edge Cache Middleware

[jrf0110]

It shouldn't matter where the Response came from, the edge cache middleware should be able to cache it and serve it early in the middleware chain.

// These would be our cache middleware options
type CacheOptions = {
  getCacheKey?: (req: URL) => string
  cache?: typeof caches.default
  edgeTTL?: number
  browserTTL?: number
  edgeTTLForHTML?: number
  browserTTLForHTML?: number
  allowedMethods?: Method[] 
}

import { Router, cache } from '8track'

const app = new Router()

// Cache all GET requests
app.get`(.*)`.use(cache())
...