feat: Add TypeScript Action (#83)

cf. https://github.com/peaceiris/actions-github-pages
Close #54

.dependabot/config.yml

@@ -1,10 +1,9 @@
 version: 1
 update_configs:
-  - package_manager: "docker"
+  - package_manager: "javascript"
     directory: "/"
     update_schedule: "daily"
     default_labels:
       - "dependencies"
-      - "docker"
     commit_message:
       prefix: "deps"