Add GitHub Action deploy.

.github/workflows/deploy.yml

@@ -0,0 +1,23 @@
+name: Deploy
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: SCP Files
+        uses: appleboy/scp-action@master
+        with:
+          host: ${{ secrets.DROPLET_IP }}
+          username: ${{ secrets.DROPLET_USER }}
+          key: ${{ secrets.DROPLET_KEY }}
+          source: "dist/*"
+          target: ${{ secrets.DEPLOY_PATH }}
+          strip_components: 1
+          rm: true