Add build alias for ECK (#2429)

* Add build alias for ECK

This adds an alias to build the Elastic Cloud on Kubernetes docs:
`docbldeck`

* Update doc_build_aliases.sh

Co-authored-by: Dan Roscigno <[email protected]>

Co-authored-by: Dan Roscigno <[email protected]>

Author: kilfoyle

doc_build_aliases.sh

@@ -119,6 +119,9 @@ alias docbldece='$GIT_HOME/docs/build_docs --doc $GIT_HOME/cloud/docs/cloud-ente
 
 alias docbldech='$GIT_HOME/docs/build_docs --doc $GIT_HOME/cloud/docs/heroku/index.asciidoc --resource=$GIT_HOME/cloud/docs/shared --resource=$GIT_HOME/cloud/docs/saas --chunk 1'
 
+# Cloud - Elastic Cloud on Kubernetes
+alias docbldeck='$GIT_HOME/docs/build_docs --doc $GIT_HOME/cloud-on-k8s/docs/index.asciidoc --chunk 1'
+
 # Cloud - Elastic Cloud Control
 alias docbldecctl='$GIT_HOME/docs/build_docs --doc $GIT_HOME/ecctl/docs/index.asciidoc --chunk 1'