greet on first interaction

.github/workflows/greet_on_first_interaction.yml

@@ -0,0 +1,16 @@
+name: Welcome on first interaction
+on:
+  issues:
+    types: [opened]
+  pull_request:
+    branches: [master]
+    types: [opened]
+jobs:
+  greet:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/first-interaction@v1
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          issue-message: '# Thank you!.\nThank you for starting making this module better!'
+          pr-message: 'Thanks for your first attempt to contribute to this module!'