* Upgrade Next.js from 9.1.2 to 9.5.3
* Inline the CSS for improved first paint performance
* Change ENV to NODE_ENV
Possibly the CSS was not minified due to this
* Remove render blocking stripe JS that seems unnecessary
* Use native lazy loading of images
- Truly a progressive enhancement, only affects browsers that support it
- Causes a warning: [Intervention] An <img> element was lazyloaded with loading=lazy, but had no dimensions specified. Specifying dimensions improves performance. See https://crbug.com/954323, which can not be easily fixed
* Render content first, hydrate after that