Add AsciiDoc serverless docs (#3096)

* add serverless book

* add docs-content repo to repo list

* fix docs-content path

* add serverless book

* add docs-content repo to repo list

* fix docs-content path

* change style of admon titles

* Revert "change style of admon titles"

This reverts commit 284484e.

* update to main

conf.yaml

@@ -19,6 +19,7 @@ repos:
     cloud-assets:         /~https://github.com/elastic/cloud-assets.git
     cloud-on-k8s:         /~https://github.com/elastic/cloud-on-k8s.git
     curator:              /~https://github.com/elastic/curator.git
+    docs-content:         /~https://github.com/elastic/docs-content.git
     ecctl:                /~https://github.com/elastic/ecctl.git
     ecs:                  /~https://github.com/elastic/ecs.git
     ecs-dotnet:           /~https://github.com/elastic/ecs-dotnet.git
@@ -124,6 +125,28 @@ variables:
 
 toc_extra: extra/docs_landing.html
 contents:
+    -   title:      Serverless
+        sections:
+          - title:      Serverless
+            prefix:     en/serverless
+            current:    main
+            branches:   [ main ]
+            live:        [ main ]
+            index:      serverless/index.asciidoc
+            chunk:      5
+            tags:       Serverless/Guide
+            subject:    Serverless
+            sources:
+              -
+                repo:   docs-content
+                path:   serverless
+              -
+                repo:   observability-docs
+                path:   docs/en/serverless
+              -
+                repo:   security-docs
+                path:   docs/serverless
+
     -   title:      Search
         sections:
           - title:      Elasticsearch Guide

doc_build_aliases.sh

@@ -9,6 +9,9 @@
 #    source $GIT_HOME/docs/doc_build_aliases.sh
 #
 
+# Serverless
+alias docbldserverless='$GIT_HOME/docs/build_docs --doc $GIT_HOME/docs-content/serverless/index.asciidoc --chunk 5 --open --resource $GIT_HOME/observability-docs/docs/en/serverless --resource $GIT_HOME/security-docs/docs/serverless --resource $GIT_HOME/docs-content/serverless'
+
 # Elasticsearch
 alias docbldesx='$GIT_HOME/docs/build_docs --doc $GIT_HOME/elasticsearch/docs/reference/index.asciidoc --chunk 1'