add linting wf

.github/workflows/pr.yaml

@@ -0,0 +1,33 @@
+Name: Pull Request
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+env:
+  PYTHON_VERSION: '3.8.2'
+
+
+jobs:
+  linting:
+    name: Linting
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout source
+        uses: actions/checkout@v2
+
+      - name: Setup Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ env.PYTHON_VERSION }}
+
+      - name: Install environment
+        run: |
+          pip install pipenv
+          pipenv install --dev --deploy
+
+      - name: Run pre-commit
+        run: |
+         pipenv run pre-commit run --all-files