chore: add github mirror push

.build.yml

@@ -7,7 +7,13 @@ secrets:
   - 291f0e35-9b8d-43ff-844c-77c5f29c1876
 environment:
   NETLIFY_SITE_ID: 390b392a-a898-491b-8500-79aa30f724d6
+  GH_USER: ayoayco
+  REPO: mcfly
 tasks:
+  - push-mirror: |
+      cd mcfly
+      git config --global credential.helper store
+      git push --mirror "https://github.com/${GH_USER}/${REPO}"
   - install-deps: |
       cd mcfly
       pnpm i
@@ -22,4 +28,4 @@ tasks:
         set -x
       }
       export NETLIFY_AUTH_TOKEN
-      pnpm -F site run deploy
+      pnpm -F site run deploy