Attempt to deploy on push to main branch.

.github/workflows/deploy.yml

@@ -0,0 +1,31 @@
+name: Deploy
+
+on:
+  push:
+    branches: [ main ]
+
+jobs:
+  deploy:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Setup Node.js
+      uses: actions/setup-node@v1
+      with:
+        node-version: '14.x'
+    - name: Cache dependencies
+      uses: actions/cache@v2
+      with:
+        path: ~/.npm
+        key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
+        restore-keys: |
+          ${{ runner.os }}-node-
+    - run: npm ci
+    - run: npm run build
+    - name: Deploy
+      uses: peaceiris/actions-gh-pages@v3
+      with:
+        github_token: ${{ secrets.GITHUB_TOKEN }}
+        publish_dir: ./dist