refactor: Remove babel/register for instant production server startup (#1481)

* refactor: Remove babel/register for instant production server startup

* fix: Update procfile location

* fix: package.json must be copied, not linked for production build

* fix: Production file paths

* fix: Public assets path

* Remove unused scripts

server/utils/prefetchTags.js

@@ -16,7 +16,7 @@ const prefetchTags = [
 
 try {
   const manifest = fs.readFileSync(
-    path.join(__dirname, "../../dist/manifest.json"),
+    path.join(__dirname, "../../app/manifest.json"),
     "utf8"
   );
   const manifestData = JSON.parse(manifest);