add noindex nofollow tags to docs

docs/global.d.ts

@@ -0,0 +1,8 @@
+declare global {
+  namespace NodeJS {
+    interface ProcessEnv {
+      NODE_ENV: 'development' | 'production';
+      CF_PAGES_BRANCH: string;
+    }
+  }
+}

docs/package.json

@@ -16,5 +16,8 @@
     "nextra-theme-docs": "^2.0.1",
     "react": "^18.2.0",
     "react-dom": "^18.2.0"
+  },
+  "devDependencies": {
+    "@types/node": "^18.11.17"
   }
 }

docs/pnpm-lock.yaml

@@ -1,6 +1,7 @@
 lockfileVersion: 5.4
 
 specifiers:
+  '@types/node': ^18.11.17
   next: ^13.0.6
   nextra: ^2.0.1
   nextra-theme-docs: ^2.0.1
@@ -14,6 +15,9 @@ dependencies:
   react: 18.2.0
   react-dom: 18.2.0_react@18.2.0
 
+devDependencies:
+  '@types/node': 18.11.17
+
 packages:
 
   /@babel/runtime/7.20.6:
@@ -382,6 +386,10 @@ packages:
     resolution: {integrity: sha512-iiUgKzV9AuaEkZqkOLDIvlQiL6ltuZd9tGcW3gwpnX8JbuiuhFlEGmmFXEXkN50Cvq7Os88IY2v0dkDqXYWVgA==}
     dev: false
 
+  /@types/node/18.11.17:
+    resolution: {integrity: sha512-HJSUJmni4BeDHhfzn6nF0sVmd1SMezP7/4F0Lq+aXzmp2xm9O7WXrUtHW/CHlYVtZUbByEvWidHqRtcJXGF2Ng==}
+    dev: true
+
   /@types/prop-types/15.7.5:
     resolution: {integrity: sha512-JCB8C6SnDoQf0cNycqd/35A7MjcnK+ZTqE7judS6o7utxUCg6imJg3QK2qzHKszlTjcj2cn+NwMB2i96ubpj7w==}
     dev: false

docs/theme.config.tsx

@@ -1,6 +1,8 @@
 import styles from './global.module.css';
 import { DocsThemeConfig } from 'nextra-theme-docs';
 
+const NO_INDEX_FOLLOW = process.env.CF_PAGES_BRANCH !== 'main';
+
 const config: DocsThemeConfig = {
   logo: (
     <span className={styles.logo}>
@@ -69,6 +71,7 @@ const config: DocsThemeConfig = {
   project: {
     link: 'https://github.com/thatmattlove/hyperglass',
   },
+  useNextSeoProps: () => ({ noindex: NO_INDEX_FOLLOW, nofollow: NO_INDEX_FOLLOW }),
 };
 
 export default config;