Add ci (#434)

* Return removed staging CA for letsenrypt

* Fix missing $

* Remove PAYMENTS_AUTORECHARGE_DEFAULT_MIN_BALANCE

* Add CI

* Fix set up python

* Use newer ubuntu

* Use pyenv

* Show python version

* minor fixes

* fix

* Formatting

.github/workflows/ci.yml

@@ -0,0 +1,31 @@
+name: CI
+
+on: [push, pull_request]
+
+jobs:
+  pre-commit:
+    runs-on: ubuntu-22.04
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Define python
+        run: echo "PYTHON_VERSION=$(cat .python-version)" >> $GITHUB_ENV
+
+      - name: Install python version
+        uses: gabrielfalcao/pyenv-action@v11
+        with:
+          default: "${{ env.PYTHON_VERSION }}"
+          command: pip install -U pip
+
+      - name: Show python version
+        run: python --version
+
+      - name: Install dependencies
+        run: |
+          pip install pre-commit
+          pre-commit install
+
+      - name: Run pre-commit
+        run: SKIP=stack-yml-generated-is-valid pre-commit run --all-files