Workflow: Added workflow for triggering doc repo + small tweaks

Author: lamATnginx

.github/workflows/build-push.yml

@@ -1,9 +1,6 @@
 name: build preview
 
 on: 
-  release: 
-    types: 
-      - published
   pull_request:
     branches:
       - "*"

.github/workflows/release-build.yml

@@ -0,0 +1,20 @@
+name: Build preview on documentation repo upon release publish
+
+on: 
+  release: 
+    types: 
+      - published
+
+jobs:
+  trigger-documentation-build:
+    runs-on: ubuntu-latest
+    steps: 
+     - name: Trigger 'Build and deploy' workflow in 'documentation' repo
+       run: |
+        curl -L \
+            -X POST \
+            -H "Accept: application/vnd.github+json" \
+            -H "Authorization: Bearer ${{ secrets.PERSONAL_ACCESS_TOKEN }}" \
+            -H "X-GitHub-Api-Version: 2022-11-28" \
+            "https://api.github.com/repos/nginx/documentation/dispatches" \
+            -d "{"event_type": "trigger-preview-build", "client_payload": {"environment": "preview", "hugo_theme_override": ""}}"

.github/workflows/slack-notification.yml

@@ -2,10 +2,8 @@ name: Slack notification for new theme release
 
 on: 
   pull_request: 
-#   workflow_run:
-#     workflows:
-#       - "documentation preview"
-#     types: [completed]
+#   repository_dispatch:
+#     types: [trigger-slack-notification]
 
 permissions:
   contents: read
@@ -52,4 +50,5 @@ jobs:
                       }]
                   }
             env:
+              SLACK_WEBHOOK_TYPE: INCOMING_WEBHOOK
               SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}