feat: initial IPFS Portal — Next.js frontend for remote IPFS node management

Multi-file upload with Quick Upload + Crypto Payment tabs.
Dashboard with live IPFS metrics, Explorer, Peers, Pins, History, Settings pages.
Docker deploy (standalone output), full test suite (16 Playwright tests).
Payment integration via IPFSPortalPayment + MockUSDC contracts on zkSync.

next.config.ts

@@ -0,0 +1,8 @@
+import type { NextConfig } from 'next';
+
+const nextConfig: NextConfig = {
+  images: { unoptimized: true },
+  output: process.env.DOCKER_BUILD ? 'standalone' : undefined,
+};
+
+export default nextConfig;