Add flake8 step in the build pipeline

Signed-off-by: mgoerens <[email protected]>

.flake8

@@ -0,0 +1,7 @@
+[flake8]
+# Recommend matching the black line length (default 88),
+# rather than using the flake8 default of 79:
+max-line-length = 88
+extend-ignore =
+    # See https://github.com/PyCQA/pycodestyle/issues/373
+    E203,

.github/workflows/build.yaml

@@ -71,6 +71,15 @@ jobs:
                 cd scripts && ../ve1/bin/pip3 install -r requirements.txt && cd ..
                 cd scripts && ../ve1/bin/python3 setup.py install && cd ..
 
+            - name: Run flake8
+              working-directory: ./chart-verifier
+              run: |
+                python3 -m venv ve_flake8
+                source ve_flake8/bin/activate
+                pip3 install flake8
+                flake8 scripts/
+                flake8 tests/
+
             - name: Check if only release file in PR
               working-directory: ./chart-verifier
               id: check_version_in_PR