Simplify deploy

Author: GroovinChip

.github/workflows/gh_pages.yml

@@ -8,8 +8,6 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
-    env:
-      my_secret: ${{secrets.GH_TOKEN}}
     steps:
       - uses: actions/checkout@v2
       - uses: subosito/flutter-action@v1
@@ -25,11 +23,10 @@ jobs:
         run: |
           cd example/build/web
           git init
-          git config --global user.email groovinchip@github.com
-          git config --global user.name GroovinChip
-          git status
-          git remote add origin https://${{secrets.GH_TOKEN}}@github.com/GroovinChip/macos_ui.git
+          git config user.name "CI"
+          git config user.email "flutter-ci@github.com"
+          git remote add secure-origin https://${{ secrets.GITHUB_TOKEN }}@github.com/GroovinChip/macos_ui.git
           git checkout -b gh-pages
-          git add --all
+          git add .
           git commit -m "update"
-          git push origin gh-pages -f
+          git push --force secure-origin gh-pages