ci(docs): add GitHub Pages deployment workflow

- Update next.config.mjs for static export with GitHub Pages support
- Add basePath and assetPrefix for /acton-reactive/ subdirectory
- Create docs.yml workflow to build and deploy on push to main
- Workflow triggers on changes to acton-docs-site/ or workflow file

Author: rrrodzilla

.github/workflows/docs.yml

@@ -0,0 +1,62 @@
+name: Deploy Docs
+
+on:
+  push:
+    branches: ["main"]
+    paths:
+      - 'acton-docs-site/**'
+      - '.github/workflows/docs.yml'
+  workflow_dispatch:
+
+# Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+# Allow only one concurrent deployment, skipping runs queued between the run in-progress and latest queued.
+concurrency:
+  group: "pages"
+  cancel-in-progress: false
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: acton-docs-site
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: "20"
+          cache: 'npm'
+          cache-dependency-path: acton-docs-site/package-lock.json
+
+      - name: Setup Pages
+        uses: actions/configure-pages@v5
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Build with Next.js
+        run: npm run build
+
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v3
+        with:
+          path: acton-docs-site/out
+
+  deploy:
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4

acton-docs-site/next.config.mjs

@@ -5,6 +5,14 @@ import withSearch from './src/markdoc/search.mjs'
 /** @type {import('next').NextConfig} */
 const nextConfig = {
   pageExtensions: ['js', 'jsx', 'md', 'ts', 'tsx'],
+  output: 'export',
+  images: {
+    unoptimized: true,
+  },
+  // Base path for GitHub Pages (repo name)
+  basePath: process.env.GITHUB_ACTIONS ? '/acton-reactive' : '',
+  // Asset prefix for GitHub Pages
+  assetPrefix: process.env.GITHUB_ACTIONS ? '/acton-reactive/' : '',
 }
 
 export default withSearch(