Update dynamic route regex for catch all

Author: spencewood

lib/serverless-next.js/expressifyDynamicRoute.js

@@ -1,7 +1,10 @@
 // Copied from serverless-next.js (v1.8.0)
 // https://github.com/danielcondemarin/serverless-next.js/blob/master/packages/serverless-nextjs-component/lib/expressifyDynamicRoute.js
 
-// converts a nextjs dynamic route /[param]/ to express style /:param/
 module.exports = dynamicRoute => {
-  return dynamicRoute.replace(/\[(?<param>.*?)]/g, ":$<param>");
+  // replace any catch all group first
+  let expressified = dynamicRoute.replace(/\[\.\.\.(.*)]$/, ":$1*");
+
+  // now replace other dynamic route groups
+  return expressified.replace(/\[(.*?)]/g, ":$1");
 };