add contributors.yml

.github/workflows/contributors.yml

@@ -0,0 +1,20 @@
+name: Contributors
+on:
+  push:
+    branches: [ main ]
+jobs:
+  add-contributors:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - uses: BobAnkh/add-contributors@master
+      with:
+        REPO_NAME: ${{github.repository}}
+        CONTRIBUTOR: '## Contributors'
+        COLUMN_PER_ROW: ''
+        ACCESS_TOKEN: ${{secrets.GITHUB_TOKEN}}
+        IMG_WIDTH: '100'
+        FONT_SIZE: '14'
+        PATH: '/README.md'
+        COMMIT_MESSAGE: 'Update contributor list in README.md'
+        AVATAR_SHAPE: 'round'