Convert from circle ci to github actions

.github/workflows/ci.yml

@@ -0,0 +1,23 @@
+on:
+  create:
+    tags:
+  push:
+    branches:
+      - main
+  pull_request:
+
+permissions:
+  contents: read
+
+jobs:
+  flake8:
+    name: flake8
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - run: pip install flake8==3.7.8
+      - run: python3 -m flake8 --show-source --statistics
+      - name: install python2 pip
+        run: sudo apt-get install -q -y python2 python-pip
+      - run: python2 -m pip install flake8==3.7.8
+      - run: python2 -m flake8 --show-source --statistics