Initial commit: EGBE chatbot template

Stripped from vercel/chatbot (Apache 2.0):
- Dropped @vercel/* packages and AI Gateway
- Removed artifacts feature (code/text/sheet/image side panel)
- Switched AI provider to @ai-sdk/openai-compatible -> EGBE LiteLLM
- Replaced Vercel Blob upload with data URLs
- Dropped Redis resumable streams and rate limiter (in-memory now)
- Added Dockerfile (Next.js standalone) + entrypoint that runs migrations
- Wired DATABASE_URL, EGBE_AI_API_URL/KEY, NEXT_PUBLIC_BASE_URL for app-deploy.sh

next.config.ts

@@ -0,0 +1,29 @@
+import type { NextConfig } from "next";
+
+const nextConfig: NextConfig = {
+  output: "standalone",
+  env: {
+    NEXT_PUBLIC_BASE_PATH: "",
+  },
+  devIndicators: false,
+  poweredByHeader: false,
+  reactCompiler: true,
+  logging: {
+    fetches: {
+      fullUrl: false,
+    },
+    incomingRequests: false,
+  },
+  images: {
+    remotePatterns: [
+      {
+        hostname: "avatar.vercel.sh",
+      },
+    ],
+  },
+  experimental: {
+    prefetchInlining: true,
+  },
+};
+
+export default nextConfig;