chore: configure github action pipieline

Author: toothlessdev

package.json

@@ -13,7 +13,8 @@
         "build": "gatsby build",
         "serve": "gatsby serve",
         "clean": "gatsby clean",
-        "typecheck": "tsc --noEmit"
+        "typecheck": "tsc --noEmit",
+        "deploy": "gh-pages -d public"
     },
     "dependencies": {
         "@mdx-js/react": "^2.3.0",