refactor(frontend): migrate from Vite to Nuxt SPA

Replace Vite and Vue Router with Nuxt framework
Update Docker, build scripts, and env vars for Nuxt generate

frontend/app/router.options.ts

@@ -0,0 +1,9 @@
+import type { RouterConfig } from '@nuxt/schema';
+
+export default <RouterConfig>{
+  scrollBehavior(to, from, savedPosition) {
+    if (savedPosition) return savedPosition;
+    if (to.meta.editorModal === true || from.meta.editorModal === true) return false;
+    return { top: 0 };
+  }
+};