Reduce frontend bundle size
Since the frontend code now gets bundled with Rollup, it's a good idea to also think about the size of our bundles.
At this stage, not a lot of the frontend code gets bundled, but the amount of bundled code will increase as we build more features. We should be able to reduce our bundle size by introducing a minification plugin such as rollup-plugin-uglify.
Benefits
Reduced bundle sizes mean fewer bytes being downloaded to the client, which leads to faster page loads and less bandwidth usage.