fix: Docker build and runtime fixes

- Fix duplicate 'signature' variable in webhooks.ts
- Add Prisma binary target for Alpine Linux
- Fix tsconfig path alias (@/* -> ./src/*)
- Add missing next-themes dependency
- Add build args for NEXT_PUBLIC_* env vars
- Fix SSR issues with zustand and providers
- Add providers-wrapper with dynamic ssr:false import
- Add SSL certs and public dir for nginx
- Update Dockerfiles for proper Prisma engine handling

frontend/src/app/login/page.tsx

@@ -1,5 +1,7 @@
 'use client';
 
+export const dynamic = 'force-dynamic';
+
 import { useEffect, useState } from 'react';
 import { useRouter, useSearchParams } from 'next/navigation';
 import { authApi } from '@/lib/api';