Revert "Upgrade docusaurus (#9284)"

This reverts commit 17e93509e9.

website/docusaurus.config.ts

@@ -74,9 +74,6 @@ export default async function createConfigAsync(): Promise<Config> {
         organizationName: 'Unleash', // Usually your GitHub org/user name.
         projectName: 'unleash.github.io', // Usually your repo name.
         trailingSlash: false,
-        markdown: {
-            mermaid: true,
-        },
         customFields: {
             // expose env vars etc here
             environment: process.env.NODE_ENV,
@@ -1031,7 +1028,6 @@ class="header-github-link"
         ],
         themes: [
             'docusaurus-theme-openapi-docs', // Allows use of @theme/ApiItem and other components
-            '@docusaurus/theme-mermaid',
         ],
         scripts: [
             {

website/package.json

@@ -3,7 +3,7 @@
   "version": "0.0.0",
   "private": true,
   "engines": {
-    "node": ">=22"
+    "node": ">=18"
   },
   "scripts": {
     "docusaurus": "docusaurus",
@@ -20,28 +20,21 @@
     "test": "NODE_ENV=test node --trace-warnings ../node_modules/.bin/jest remote-content"
   },
   "dependencies": {
-    "@docusaurus/core": "^3.7.0",
-    "@docusaurus/plugin-client-redirects": "^3.7.0",
-    "@docusaurus/plugin-content-docs": "^3.7.0",
-    "@docusaurus/plugin-google-analytics": "^3.7.0",
-    "@docusaurus/preset-classic": "^3.7.0",
+    "@docusaurus/core": "^3.6.0",
+    "@docusaurus/plugin-client-redirects": "^3.6.0",
+    "@docusaurus/plugin-google-analytics": "^3.6.0",
+    "@docusaurus/preset-classic": "^3.6.0",
     "@docusaurus/remark-plugin-npm2yarn": "3.7.0",
-    "@docusaurus/theme-common": "^3.7.0",
-    "@docusaurus/theme-mermaid": "^3.7.0",
-    "@docusaurus/utils": "^3.7.0",
-    "@docusaurus/utils-validation": "^3.7.0",
     "@mdx-js/react": "^3.1.0",
     "docusaurus-plugin-openapi-docs": "^4.2.0",
     "docusaurus-plugin-remote-content": "^4.0.0",
-    "docusaurus-plugin-sass": "^0.2.6",
-    "docusaurus-theme-openapi-docs": "4.3.5",
+    "docusaurus-theme-openapi-docs": "^4.2.0",
     "git-url-parse": "^15.0.0",
     "plugin-image-zoom": "flexanalytics/plugin-image-zoom",
     "prism-react-renderer": "^2.4.0",
     "prism-svelte": "^0.5.0",
     "react": "^18.3.1",
-    "react-dom": "^18.3.1",
-    "sass": "^1.85.1"
+    "react-dom": "^18.3.1"
   },
   "browserslist": {
     "production": [
@@ -56,8 +49,8 @@
     ]
   },
   "devDependencies": {
-    "@docusaurus/module-type-aliases": "^3.7.0",
-    "@docusaurus/types": "^3.7.0",
+    "@docusaurus/module-type-aliases": "^3.6.0",
+    "@docusaurus/types": "^3.6.0",
     "@tsconfig/docusaurus": "2.0.3",
     "@types/react": "^18.3.12",
     "typescript": "5.6.3"