Create lint.yml

.github/workflows/lint.yml

@@ -0,0 +1,16 @@
+name: Lint
+
+on: pull_request
+
+jobs:
+  eslint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: hallee/eslint-action@1.0.3
+        # GITHUB_TOKEN in forked repositories is read-only
+        # https://help.github.com/en/actions/reference/events-that-trigger-workflows#pull-request-event-pull_request
+        if: ${{ github.event_name == 'push' || github.event.pull_request.head.repo.full_name == github.repository }} 
+        with:
+          repo-token: ${{secrets.GITHUB_TOKEN}}
+          source-root: optional-sub-dir