Nuxt.js static app is loading indefinitely - deployment

Question

I just finished a Nuxt.js project, and I want to deploy it on a web server. So, I executed the command nuxt generate to have a static app. Before this, everything was working perfectly, but now nothing is working : the page is loading indefinitely with a rotating black and gray round in the center of the page.
Here is a picture
EDIT:
I am hosting my app on OVHcloud, and here is a public repo of my app : https://github.com/maximehamou/public.mh-info.fr.
Here is my nuxt.config.js
export default {
// Disable server-side rendering: https://go.nuxtjs.dev/ssr-mode
ssr: false,
target: "static",
// Global page headers: https://go.nuxtjs.dev/config-head
head: {
title: "Accueil | MH info",
htmlAttrs: {
lang: "fr",
},
meta: [
{ charset: "utf-8" },
{ name: "viewport", content: "width=device-width, initial-scale=1" },
{ hid: "description", name: "description", content: "" },
{ name: "format-detection", content: "telephone=no" },
],
link: [{ rel: "icon", type: "image/x-icon", href: "/favicon.ico" }],
script: [{ src: "https://kit.fontawesome.com/048c7a73f1.js/" }],
},
// Global CSS: https://go.nuxtjs.dev/config-css
css: ["./css/general.css"],
server: {
port: 4000,
},
};
Here is my package.json
{
"name": "mh-info.fr",
"version": "1.0.0",
"private": true,
"scripts": {
"dev": "nuxt",
"build": "nuxt build",
"start": "nuxt start",
"generate": "nuxt generate",
"sass": "sass -w scss:css"
},
"dependencies": {
"buttercms": "^1.2.9",
"core-js": "^3.19.3",
"nuxt": "^2.15.8",
"sass": "^1.54.9",
"vue": "^2.6.14",
"vue-server-renderer": "^2.6.14",
"vue-template-compiler": "^2.6.14",
"webpack": "^4.46.0"
}
}

Answer 1

Update regarding my latest changes on a cloned version of your project.
I achieved to have something properly working here: https://kissu-makes-great-sites.netlify.app/fr/tous-les-articles
Main conclusion is that there is a LOT of things to fix/improve on.
You're not writing your app as you should with Vue (even less in a Nuxt way).
There is too much to cover into a single response, so I recommend that you ping me on Twitter, Discord or by email if you want a more in-depth explanation/mentoring on how to fix all of this.
PS: I speak french, lived there for 20 years. 🇫🇷