adding flake8 pipeline

.github/workflows/flake8.yaml

@@ -0,0 +1,17 @@
+name: Run flake8
+
+on: [pull_request]
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+      - uses: grantmcconnaughey/lintly-flake8-github-action@v1.0
+        with:
+          # The GitHub API token to create reviews with
+          token: ${{ secrets.GITHUB_TOKEN }}
+          # Fail if "new" violations detected or "any", default "new"
+          failIf: new
+          # Additional arguments to pass to flake8, default "." (current directory)
+          args: "."