Merge #811

811: Update deployment workflow r=sanders41 a=Strift

# Pull Request

## What does this PR do?

Update the `documentation.yml` to:
- Separate build & deploy steps
- Create a CNAME file in the built files folder
- Deploy the built files to Github Pages environment
- Allow the workflow to run manually 

Additionally, this PR removes the `CNAME` file from the root of the repo. 

## PR checklist
Please check if your PR fulfills the following requirements:
- [x] Does this PR fix an existing issue, or have you listed the changes applied in the PR description (and why they are needed)?
- [x] Have you read the contributing guidelines?
- [x] Have you made sure that the title is accurate and descriptive of the changes?

Thank you so much for contributing to Meilisearch!


Co-authored-by: Strift <laurent@meilisearch.com>

Author: meili-bors[bot]

.github/workflows/documentation.yml

@@ -1,21 +1,41 @@
 name: Documentation
+
 on:
   push:
     tags:
       - v*
+  # Allows to run the workflow manually
+  workflow_dispatch:
+
+# Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+# 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
+
+env:
+  CUSTOM_DOMAIN: python-sdk.meilisearch.com
 
 jobs:
-  docs:
+  build:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
         with:
           fetch-depth: 0
           lfs: true
+      - name: Setup Github Pages
+        uses: actions/configure-pages@v3
       - name: Install Python
         uses: actions/setup-python@v4
         with:
-          python-version: '3.10'
+          python-version: "3.10"
       - name: Install pipenv
         run: |
           pip install pipx
@@ -29,9 +49,22 @@ jobs:
         run: |
           pipenv run sphinx-apidoc -f -o docs meilisearch/
           pipenv run sphinx-build docs ./docs/_build/html/
-      - name: Deploy
-        uses: peaceiris/actions-gh-pages@v3
+        # CNAME file is required for GitHub pages custom domain
+      - name: Create CNAME file
+        run: |
+          echo "$CUSTOM_DOMAIN" > ./docs/_build/html/CNAME
+          echo "Created CNAME in ./docs/_build/html/: $CUSTOM_DOMAIN"
+      - name: Upload artifacts
+        uses: actions/upload-pages-artifact@v2
         with:
-          github_token: ${{ secrets.GITHUB_TOKEN }}
-          publish_dir: docs/_build/html
-          force_orphan: true
+          path: "./docs/_build/html"
+  deploy:
+    needs: build
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v2