Create openapi checks

.github/workflows/checks.yml

@@ -0,0 +1,24 @@
+name: Checks
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    types:
+      - opened
+      - reopened
+      - synchronize
+
+jobs:
+  checks:
+    runs-on: ubuntu-latest
+    name: OpenAPI definition
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+    - name: Run check
+      uses: fluximus-prime/redocly-cli-github-action@v1
+      with:
+        args: lint openapi.yaml