add workflow

.github/workflows/check-test.yaml

@@ -0,0 +1,33 @@
+name: Python CI
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v4
+
+    - name: Set up Python
+      uses: actions/setup-python@v5
+      with:
+        python-version: '3.10'
+
+    - name: Install dependencies
+      run: |
+        python -m venv venv
+        source venv/bin/activate
+        pip install -r requirements.txt
+
+    - name: Lint with mypy
+      run: |
+        source venv/bin/activate
+        mypy service