Set up GitHub Pages deployment with GitHub Actions

.github/workflows/deploy.yml

@@ -0,0 +1,47 @@
+name: Deploy to GitHub Pages
+
+on:
+  push:
+    branches:
+      - master
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+jobs:
+  build-and-deploy:
+    runs-on: ubuntu-latest
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+          cache: 'npm'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Build project
+        run: npm run build
+
+      - name: Setup Pages
+        uses: actions/configure-pages@v4
+
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v3
+        with:
+          path: './build'
+
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4

.nvmrc

@@ -1 +1 @@
-16
+20

package.json

@@ -2,6 +2,7 @@
   "name": "kalevalamitta",
   "version": "0.1.0",
   "private": true,
+  "homepage": "https://ktkiiski.github.io/kalevalamitta",
   "dependencies": {
     "@testing-library/jest-dom": "^5.16.2",
     "@testing-library/react": "^12.1.3",