build: add auto-publish to gh-pages workflow

Signed-off-by: Vinayak Kulkarni <19776877+vinayakkulkarni@users.noreply.github.com>

.github/workflows/pipeline.yml

@@ -32,6 +32,14 @@ jobs:
     needs:
       - extract-branch
     uses: maptiler/tileserver-gl/.github/workflows/ct.yml@master
+  publish-openapi-specs:
+    name: 'Publish OpenAPI specs'
+    needs:
+      - extract-branch
+      - ci
+      - ct
+    if: github.event_name == 'push' && needs.extract-branch.outputs.current_branch == 'master'
+    uses: maptiler/tileserver-gl/.github/workflows/publish-specs.yml@master
   automerger:
     name: 'Automerge Dependabot PRs'
     needs:

.github/workflows/publish-specs.yml

@@ -0,0 +1,37 @@
+name: Deploy Specs to Pages
+
+on:
+  workflow_call:
+
+jobs:
+  deploy:
+    runs-on: ubuntu-20.04
+    steps:
+      - name: Check out repository ✨ (non-dependabot)
+        if: ${{ github.actor != 'dependabot[bot]' }}
+        uses: actions/checkout@v3
+
+      - name: Check out repository 🎉 (dependabot)
+        if: ${{ github.actor == 'dependabot[bot]' }}
+        uses: actions/checkout@v3
+        with:
+          ref: ${{ github.event.pull_request.head.sha }}
+
+      - name: Setup node env 📦
+        uses: actions/setup-node@v3
+        with:
+          node-version-file: 'package.json'
+          check-latest: true
+          cache: 'npm'
+
+      - name: Generate Swagger UI
+        uses: Legion2/swagger-ui-action@v1.1.6
+        with:
+          output: dist
+          spec-file: specs/openapi.yaml
+
+      - name: Deploy to GitHub Pages
+        uses: peaceiris/actions-gh-pages@v3.9.1
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: dist