Update django.yml with lint section

.github/workflows/django.yml

@@ -7,8 +7,29 @@ on:
     branches: [ "main" ]
 
 jobs:
-  build:
+  lint-check:
+    runs-on: ubuntu-latest
+    strategy:
+      max-parallel: 3
+      matrix:
+        python-version: ['3.10', 3.11, 3.12]
+
+    steps:
+      - uses: actions/checkout@main
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@main
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Lint with flake8
+        run: |
+          pip install flake8
+          # stop the build if there are Python syntax errors or undefined names
+          flake8 demoproject --exclude demoproject/static --exclude demoproject/migrations,demoproject/tests --count --ignore=D100,D104,D105,D106,D107  --max-line-length=120 --show-source --statistics
+          # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
+          flake8 --exclude demoproject/static --exclude demoproject/migrations,demoproject/tests --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
+
 
+  build-and-test:
     runs-on: ubuntu-latest
     strategy:
       max-parallel: 4