Added workflow for publishing redoc to Github Pages

.github/workflows/redoc.yml

@@ -0,0 +1,74 @@
+name: redoc
+
+on:
+  # Triggers the workflow on push or pull request events but only for the "main" branch
+  push:
+    branches: [ "main" ]
+    paths:
+      - '.github/workflows/redoc.yml'
+      - Lemmy.yaml
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+# Allow only one concurrent deployment, skipping runs queued between the run in-progress and latest queued.
+# However, do NOT cancel in-progress runs as we want to allow these production deployments to complete.
+concurrency:
+  group: "pages"
+  cancel-in-progress: false
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Build index.html
+        id: redoc-build
+        shell: bash
+        run: |
+          echo "Building index.html started" && \
+          npx redoc-cli build Lemmy.yaml --title "Lemmy Client API" && \
+          mv redoc-static.html index.html && \
+          sed -i '/<title>/a \ \ <link rel="icon" type="image/x-icon" href="images/favicon.ico">' index.html && \
+          echo "Building index.html finished"
+
+      - name: Deploy to GitHub Pages
+        # https://github.com/peaceiris/actions-gh-pages
+        uses: peaceiris/actions-gh-pages@v3
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: .
+          force_orphan: true
+          exclude_assets: '.github,LICENSE,README.md'
+
+  deploy:
+    needs: build
+
+    # Grant GITHUB_TOKEN the permissions required to make a Pages deployment
+    permissions:
+      contents: read
+      pages: write      # to deploy to Pages
+      id-token: write   # to verify the deployment originates from an appropriate source
+
+    # Deploy to the github-pages environment
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+
+    # Specify runner + deployment step
+    runs-on: ubuntu-latest
+    steps:
+      - name: Setup Pages
+        uses: actions/configure-pages@v4
+
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v3
+        with:
+          # Upload entire repository
+          path: '.'
+
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4