process.env.FILE_LIST does not include index (service workers)

[aral]

To reproduce:

1. npx create-choo-app choo-app
2. npm run build
3. cat dist/sw.js

Expected output:

!function(){var e=["f496337daa245e10/bundle.js","caa723c7a1b764f2/bundle.css","assets/icon.png","manifest.json", "index.html", "/"]; //…

Actual output:

!function(){var e=["f496337daa245e10/bundle.js","caa723c7a1b764f2/bundle.css","assets/icon.png","manifest.json"];

Workaround:

In sw.js, add:

var URLS = process.env.FILE_LIST.concat(['index.html', '/']) // cache the index also

[ungoldman]

It looks like this environment variable is defined here:

https://github.com/choojs/bankai/blob/41a32b3361d5ad926a74bf63fb5345606091a4fd/lib/graph-service-worker.js#L121-L133

[aral]

Do you think we could get away with tacking ‘index.html’ and ‘/‘ onto the array there or is there a cleaner way to do this?