Initial commit: DNS Test - DNS health checking tool

Go backend (miekg/dns) + Nuxt 3 frontend (Tailwind CSS v4).

8 check categories, 52 checks total:
- Overview: @ record, WWW, MX with ASN/provider lookup
- Domain Registration: expiry, registrar (RDAP + whois fallback)
- Parent Delegation: NS records, glue, consistency
- Nameservers: 17 checks (reachability, auth, recursion, TCP/UDP, AXFR, etc.)
- SOA: serial consistency, timing values
- Mail (MX): 11 checks (CNAME, PTR, public IPs, consistency)
- Mail Auth: SPF, DKIM, DMARC
- WWW: A record, CNAME

Features:
- SSE streaming (results appear as each category completes)
- SQLite history (modernc.org/sqlite)
- Rate limiting, CORS, request logging
- Dark mode, responsive design

frontend/nuxt.config.ts

@@ -0,0 +1,45 @@
+import tailwindcss from '@tailwindcss/vite'
+
+// https://nuxt.com/docs/api/configuration/nuxt-config
+export default defineNuxtConfig({
+  compatibilityDate: '2025-07-15',
+  devtools: { enabled: true },
+
+  vite: {
+    plugins: [
+      tailwindcss(),
+    ],
+  },
+
+  css: ['~/assets/css/main.css'],
+
+  app: {
+    baseURL: '/dnstest/',
+    head: {
+      title: 'DNS Test',
+      meta: [
+        { charset: 'utf-8' },
+        { name: 'viewport', content: 'width=device-width, initial-scale=1' },
+        { name: 'description', content: 'Check your domain\'s DNS health with comprehensive DNS testing and reporting.' },
+      ],
+      htmlAttrs: {
+        lang: 'en',
+      },
+    },
+  },
+
+  runtimeConfig: {
+    public: {
+      apiBase: process.env.NUXT_PUBLIC_API_BASE || '/dnstest/api',
+    },
+  },
+
+  nitro: {
+    devProxy: {
+      '/dnstest/api/': {
+        target: 'http://localhost:8080/dnstest/api/',
+        changeOrigin: true,
+      },
+    },
+  },
+})