add github workflow for checking openapi (#1551)

* add github workflow for checking openapi

* verbose errors

* actual fix? remove env_names from BaseSettings class?

* dont kill process in workflow

* poetry version 1.5.1 for openapiu

.github/workflows/openapi.yml

@@ -0,0 +1,27 @@
+name: openapi
+
+on: [push, pull_request]
+
+jobs:
+  check:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ["3.9"]
+        poetry-version: ["1.5.1"]
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up Poetry ${{ matrix.poetry-version }}
+        uses: abatilo/actions-poetry@v2
+        with:
+          poetry-version: ${{ matrix.poetry-version }}
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.python-version }}
+          cache: "poetry"
+      - name: Install dependencies
+        run: |
+          poetry install
+      - name: Run tests
+        run: make openapi