Deploy redoc to github pages

See #6

.github/workflows/openapi.yml

@@ -0,0 +1,72 @@
+name: OpenAPI
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+  lint:
+    name: Lint
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up node
+        uses: actions/setup-node@v4
+
+      - name: Install Redocly CLI
+        run: npm install -g @redocly/cli@latest
+
+      - name: Run linting
+        run: redocly lint openapi/*/openapi.yaml --format=github-actions
+
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    needs: lint
+    steps:
+      - name: Set up node
+        uses: actions/setup-node@v4
+
+      - name: Install Redocly CLI
+        run: npm install -g @redocly/cli@latest
+
+      - name: Create output directory
+        run: mkdir -p build
+
+      - name: Build pre-5
+        run: redocly build-docs openapi/pre-5/openapi.yaml --output build/pre-5.html
+
+      - name: Build pre-7
+        run: redocly build-docs openapi/pre-7/openapi.yaml --output build/pre-7.html
+
+      - name: Setup Pages
+        if: github.ref == 'refs/heads/main'
+        uses: actions/configure-pages@v3
+
+      - name: Upload Artifact
+        if: github.ref == 'refs/heads/main'
+        uses: actions/upload-pages-artifact@v1
+        with:
+          path: ./build
+
+  deploy:
+    if: github.ref == 'refs/heads/main'
+    runs-on: ubuntu-latest
+    needs: build
+
+    permissions:
+      pages: write
+      id-token: write
+
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v2