Add GitHub Actions workflow for beta deployment

Author: NellowTCS

.github/workflows/beta-build.yml

@@ -0,0 +1,63 @@
+name: Deploy to Beta
+
+on:
+  push:
+    branches:
+      - updates
+  workflow_dispatch:
+
+# Allow only one concurrent deployment
+concurrency:
+  group: "deploy-beta"
+  cancel-in-progress: false
+
+permissions:
+  contents: write
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout source repo
+        uses: actions/checkout@v4
+        with:
+          ref: updates
+
+      - name: Use Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: "20"
+
+      - name: Install dependencies
+        working-directory: Build
+        run: npm i
+
+      - name: Build
+        working-directory: Build
+        run: npm run build
+
+      - name: Checkout target repo
+        uses: actions/checkout@v4
+        with:
+          repository: HTMLToolkit/beta
+          path: beta
+          ref: main
+          token: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Clear and copy build to subfolder
+        run: |
+          rm -rf beta/HTMLPlayerBeta/*
+          cp -r Build/dist/* beta/HTMLPlayerBeta/
+
+      - name: Commit and push changes
+        run: |
+          cd beta
+          git config --global user.name 'github-actions[bot]'
+          git config --global user.email 'github-actions[bot]@users.noreply.github.com'
+          git add HTMLPlayerBeta
+          if git diff --staged --quiet; then
+            echo "No changes to commit"
+          else
+            git commit -m "Deploy HTMLPlayer build from updates branch"
+            git push origin main
+          fi