chore: clean up repo for public release

- Remove BMAD framework, IDE configs, dev screenshots, test files,
  internal docs, and backup files
- Rename keep-notes/ to memento-note/
- Update all references from keep-notes to memento-note
- Add Apache 2.0 license with Commons Clause (non-commercial restriction)
- Add clean .gitignore and .env.docker.example

memento-note/next.config.ts

@@ -0,0 +1,29 @@
+import type { NextConfig } from "next";
+
+const withPWA = require("@ducanh2912/next-pwa").default({
+  dest: "public",
+  register: true,
+  skipWaiting: true,
+  disable: process.env.NODE_ENV === "development",
+});
+
+const nextConfig: NextConfig = {
+  // Enable standalone output for Docker
+  output: 'standalone',
+
+  // Optimize for production
+  reactStrictMode: true,
+
+  // Image optimization (enabled for better performance)
+  images: {
+    formats: ['image/avif', 'image/webp'],
+  },
+
+  // Hide the "compiling" indicator
+  devIndicators: false,
+
+  // Silence warning from Next-PWA custom webpack injections
+  turbopack: {},
+};
+
+export default withPWA(nextConfig);