Fix GitHub Pages deploy failure caused by duplicate artifact files and missing front matter

.github/workflows/pages.yml

@@ -0,0 +1,42 @@
+name: Deploy Jekyll site to 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
+      - name: Setup Pages
+        uses: actions/configure-pages@v5
+      - name: Build with Jekyll
+        uses: actions/jekyll-build-pages@v1
+        with:
+          source: ./
+          destination: ./_site
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v3
+
+  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

_config.yml

@@ -1,2 +1,4 @@
 theme: jekyll-theme-slate
 title: Multiphysics Simulation Methods in Computer Graphics
+exclude:
+  - README.md

index.md

@@ -1,3 +1,7 @@
+---
+layout: default
+---
+
 <p align=center>
  <img src="images/teaser.jpg" width="100%">
 </p>