add github workflow

.github/workflows/pythonapp.yml

@@ -0,0 +1,29 @@
+name: tests
+
+on: [push]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+      - name: Parse Python version
+        run: sed  s/python-// runtime.txt | head > .python-version
+      - name: Set up Python
+        uses: actions/setup-python@v4
+        with:
+          python-version-file: ".python-version"
+      - name: Install dependencies
+        run: |
+          sudo apt install -y libgeos-dev
+          python -m pip install --upgrade pip
+          pip install -r requirements.txt
+      - name: ruff
+        run: |
+          ruff .
+          ruff format . --check
+      - name: Test with pytest
+        run: |
+          pip install pytest
+          python -m pytest tests

runtime.txt

@@ -0,0 +1 @@
+python-3.10.13