Fix deployment step (#27)

* Add email configuration

* Use built-in actions

* Add checkout

.github/workflows/deploy.yml

@@ -15,7 +15,7 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
-  deploy:
+  build:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
@@ -24,6 +24,24 @@ jobs:
       - name: Install dependencies
         run: npm ci
 
-      - name: Deploy
-        run: |
-          npm run deploy
+      - name: Build static files
+        id: build
+        run: npm run build
+
+      - name: Upload static files as artifact
+        id: deployment
+        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
+