Try optional catch all routing (#1277)

* try optional catch all routing

* use rewrites

* move rewrite to vercel.json

Co-authored-by: repo-ranger[bot] <39074581+repo-ranger[bot]@users.noreply.github.com>

api/image/[...id].js

@@ -43,8 +43,12 @@ module.exports = async (req, res) => {
   })
 
   try {
-    const { state, id, ...params } =
-      req.method === 'GET' ? req.query : await json(req, { limit: '6mb' })
+    const {
+      state,
+      id: _id,
+      ...params
+    } = req.method === 'GET' ? req.query : await json(req, { limit: '6mb' })
+    const id = _id && _id !== 'index' ? _id : undefined
 
     const page = await browser.newPage()
 

api/image/index.js

@@ -1 +0,0 @@
-module.exports = require('./[id]')

vercel.json

@@ -5,5 +5,6 @@
   "github": {
     "autoAlias": false,
     "silent": true
-  }
+  },
+  "rewrites": [{ "source": "/api/image", "destination": "/api/image/index" }]
 }