Add NUC Portal - infrastructure dashboard

Next.js 16 dashboard for managing NUC services via Coolify API.
Features service cards with health indicators, deployment dashboard
with live log streaming, S3-backed preview images, SSE real-time
updates, and dark mode support. 18 services across 7 categories.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

nuc-portal/.gitignore

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+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.*
+.yarn/*
+!.yarn/patches
+!.yarn/plugins
+!.yarn/releases
+!.yarn/versions
+
+# testing
+/coverage
+
+# next.js
+/.next/
+/out/
+
+# production
+/build
+
+# misc
+.DS_Store
+*.pem
+
+# debug
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+.pnpm-debug.log*
+
+# env files (can opt-in for committing if needed)
+.env*
+
+# vercel
+.vercel
+
+# typescript
+*.tsbuildinfo
+next-env.d.ts