switch to nextra

package.json

@@ -1,48 +1,15 @@
 {
-  "name": "memoir",
-  "version": "1.0.0",
   "private": true,
+  "license": "MIT",
   "scripts": {
-    "docusaurus": "docusaurus",
-    "start": "docusaurus start",
-    "build": "docusaurus build",
-    "swizzle": "docusaurus swizzle",
-    "deploy": "docusaurus deploy",
-    "clear": "docusaurus clear",
-    "serve": "docusaurus serve",
-    "write-translations": "docusaurus write-translations",
-    "write-heading-ids": "docusaurus write-heading-ids",
-    "typecheck": "tsc"
+    "dev": "next dev",
+    "build": "next build && next export"
   },
   "dependencies": {
-    "@docusaurus/core": "^2.3.1",
-    "@docusaurus/preset-classic": "^2.3.1",
-    "@mdx-js/react": "^1.6.22",
-    "clsx": "^1.2.1",
-    "prism-react-renderer": "^1.3.5",
-    "react": "^17.0.2",
-    "react-dom": "^17.0.2"
-  },
-  "devDependencies": {
-    "@docusaurus/module-type-aliases": "^2.3.1",
-    "@docusaurus/theme-common": "^2.3.1",
-    "@easyops-cn/docusaurus-search-local": "^0.34.0",
-    "@tsconfig/docusaurus": "^1.0.6",
-    "typescript": "^4.9.5"
-  },
-  "browserslist": {
-    "production": [
-      ">0.5%",
-      "not dead",
-      "not op_mini all"
-    ],
-    "development": [
-      "last 1 chrome version",
-      "last 1 firefox version",
-      "last 1 safari version"
-    ]
-  },
-  "engines": {
-    "node": ">=18"
+    "next": "^13.2.3",
+    "nextra": "^2.2.18",
+    "nextra-theme-docs": "^2.2.18",
+    "react": "^18.2.0",
+    "react-dom": "^18.2.0"
   }
 }