Added flake8 github action test

.github/workflows/flake8.yml

@@ -0,0 +1,25 @@
+name: flake8
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  checkSyntax:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Python Setup
+        uses: actions/setup-python@v4
+        with:
+          python-version: '3.10'
+          architecture: x64
+      - name: Checkout Source
+        uses: actions/checkout@v4
+      - name: Install flake8
+        run: pip install flake8
+      - name: Syntax Error Check
+        run: flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics --exclude external
+      - name: Code Style Check
+        run: flake8 . --count --max-line-length=99 --ignore E221,E226,E228,E241 --show-source --statistics --exclude external

README.md

@@ -1,5 +1,7 @@
 # S-ENDA Catalog rebuilder
 
+[![flake8](https://github.com/metno/catalog-rebuilder/actions/workflows/syntax.yml/badge.svg?branch=main)](https://github.com/metno/catalog-rebuilder/actions/workflows/syntax.yml)
+
 Catalog rebuilder of CSW and Solr for the S-ENDA project.
 
 ## Design