Injects environment variables into the app through webpack, rather than
script snippets in index.html.
As part of this:
* Updated server.js to use node’s path package to resolve file paths
* Ensure that all url environment variables passed to the app don’t
have a trailing slash, allowing for cleaner template urls
**Note**: There are still a number of constants that should be taken
out of the app and put into environment variables.
Could be turned into a createHistory enhancer function
(https://github.com/rackt/history/blob/master/docs/Glossary.md#createhis
toryenhancer), but we’ll see what the guys at rackt/history say about
it…
