Improve performance of website on mobile

[mraible]

Overview of the feature request

I tested the new site with PageSpeed Insights this morning and found the mobile version is awesome at everything but peformance (50/100).

Motivation for or Use Case

The desktop version scores well, so this makes me think it might be easy to optimize the mobile version.

PageSpeed Report: https://pagespeed.web.dev/analysis/https-www-jhipster-tech/rn2759m67h?form_factor=mobile

[SvMak]

The main optimization problem is in the main chunk, the number of pages increases the size of this file (routes.js, registry.js, etc.) and this causes performance issue. Now I'm still research way to solve this issue((

[mraible]

Now we're up to 53.

I suppose this is expected since Jekyll (the old site) generates a static website, and Docusaurus (the new site) generates a SPA. Everything loads so fast locally that I thought Docusaurus was a static site generator.

[SvMak]

I'm tracking this issue in both Docusaurus and react-router-dom, I think we can find a solution to this issue.