ci: deploy docs when they change (#2234)

Signed-off-by: Kévin Dunglas <kevin@dunglas.fr>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

.github/workflows/docker.yaml

@@ -1,5 +1,5 @@
 ---
-name: Build Docker images
+name: Build Docker Images
 concurrency:
   cancel-in-progress: true
   group: ${{ github.workflow }}-${{ github.ref }}

.github/workflows/docs.yaml

@@ -0,0 +1,22 @@
+---
+name: Deploy Docs
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - "docs/**"
+      - "README.md"
+      - "CONTRIBUTING.md"
+permissions: {}
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+jobs:
+  deploy:
+    runs-on: ubuntu-slim
+    steps:
+      - name: Trigger website deployment
+        env:
+          GH_TOKEN: ${{ secrets.WEBSITE_DEPLOY_TOKEN }}
+        run: gh api repos/dunglas/frankenphp-website/actions/workflows/hugo.yaml/dispatches -f ref=main