add to build docs how to pre-pull docker images

Author: Jeff McCormick

docs/build.asciidoc

@@ -142,6 +142,23 @@ itself:
 * link:https://github.com/CrunchyData/postgres-operator/blob/master/docs/build.asciidoc#get-packaged-dependencies[Get packaged dependencies]
 * link:https://github.com/CrunchyData/postgres-operator/blob/master/docs/build.asciidoc#build-from-source[Build from source]
 
+=== Pull Postgres Containers
+
+The Operator works with the Crunchy Container Suite
+containers, you can pre-pull them as follows:
+....
+docker pull crunchydata/crunchy-postgres:centos7-10.0-1.6.0
+docker pull crunchydata/crunchy-backup:centos7-10.0-1.6.0
+docker pull crunchydata/crunchy-upgrade:centos7-10.0-1.6.0
+....
+
+For PostgreSQL version 9.6:
+....
+docker pull crunchydata/crunchy-postgres:centos7-9.6.5-1.6.0
+docker pull crunchydata/crunchy-backup:centos7-9.6.5-1.6.0
+docker pull crunchydata/crunchy-upgrade:centos7-9.6.5-1.6.0
+....
+
 === Get Packaged Dependencies
 
 At this point if you want to avoid building the images and binary