Add GitHub Actions deployment workflow

- Auto deploy to GitHub Pages on push to main
- Configure deploymentBranch for gh-pages

Author: Nguyễn Tuấn Việt

.github/workflows/deploy.yml

@@ -0,0 +1,53 @@
+name: Deploy to GitHub Pages
+
+on:
+  push:
+    branches:
+      - main
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+concurrency:
+  group: "pages"
+  cancel-in-progress: false
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Setup Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: yarn
+
+      - name: Install dependencies
+        run: yarn install --frozen-lockfile
+
+      - name: Build website
+        run: yarn build
+
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v3
+        with:
+          path: build
+
+  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

docusaurus.config.ts

@@ -14,6 +14,7 @@ const config: Config = {
   // Cấu hình GitHub Deployment
   organizationName: 'brewkits',
   projectName: 'brewkits.github.io',
+  deploymentBranch: 'gh-pages',
   trailingSlash: false,
 
   onBrokenLinks: 'throw',