fix(cf-worker): parse Headers as key value object

https://stackoverflow.com/a/72415727

cf-images/index.js

@@ -102,7 +102,7 @@ export default {
       const { status, statusText } = response
 
       const htmlHeader = new Headers({
-        ...request.headers,
+        ...Object.fromEntries(request.headers),
         Accept: 'text/html'
       })
       const page404 = new Request('https://mdleom.com/404', {

functions/images/[[catchall]].js

@@ -2,7 +2,7 @@ export async function onRequestGet (context) {
   const { pathname } = new URL(context.request.url)
   const imageURL = new URL(pathname, 'https://mdleom.com')
   const headers = new Headers({
-    ...context.request.headers,
+    ...Object.fromEntries(context.request.headers),
     'Host': 'mdleom.com'
   })
   const imageRequest = new Request(imageURL, {