ci: add deploy action

.github/workflows/deploy.yml

@@ -0,0 +1,19 @@
+on:
+    push:
+        branches:
+        - master
+  name: Deploy to Github Pages
+  jobs:
+    deploy:
+      name: deploy
+      runs-on: ubuntu-latest
+      steps:
+        - uses: actions/checkout@master
+        - name: Deploy
+          uses: JamesIves/github-pages-deploy-action@master
+          env:
+            ACCESS_TOKEN: ${{ secrets.GITHUB_ACCESS_TOKEN }}
+            BRANCH: gh-pages
+            FOLDER: out
+            BUILD_SCRIPT: npm ci && npm run build
+            CNAME: slashdev.space