Fix chunk links in with-react-loadable example (#550)
Fix chunk links in with-react-loadable example (#550)

Fix incorrect link to chunk scripts caused by string concatenation instead of incrementing the port number value.

`process.env.*` values are strings, so in the example file port value was `'30001'` instead of `3001`.
jaredpalmer/razzle,jaredpalmer/razzle,jaredpalmer/react-production-starter