adding reference architecture content set

conf.yaml

@@ -1519,7 +1519,20 @@ contents:
                 repo:   docs
                 path:   shared/attributes.asciidoc
                 exclude_branches:   [ 6.2, 6.1, 6.0, 5.6, 5.5, 5.4, 5.3, 5.2, 5.1, 5.0, 2.4, 2.3, 2.2, 2.1, 2.0, 1.7, 1.6, 1.5, 1.4, 1.3, 0.90 ]
-
+          - title:      Reference Architectures
+            prefix:     en/reference-architectures
+            current:    main
+            index:      docs/en/reference-architectures/index.asciidoc
+            branches:   [ {main: master} ]
+            tags:       Reference Architectures
+            subject:    Reference Architectures
+            sources:
+              -
+                repo:   stack-docs
+                path:   docs/en
+              -
+                repo:   docs
+                path:   shared/attributes.asciidoc
     -   title:     "Ingest: Add your data"
         sections:
           - title:      Elastic Ingest Reference Architectures

doc_build_aliases.sh

@@ -302,3 +302,6 @@ alias docbldall='$GIT_HOME/docs/build_docs --all --target_repo [email protected]:el
 
 # Machine learning
 alias docbldml='$GIT_HOME/docs/build_docs --doc $GIT_HOME/stack-docs/docs/en/stack/ml/index.asciidoc --resource $GIT_HOME/elasticsearch/docs --chunk 1'
+
+# Reference Architectures
+alias docbldrefarch='$GIT_HOME/docs/build_docs --doc $GIT_HOME/stack-docs/docs/en/reference-architectures/index.asciidoc --chunk 1'