Add prereq section

Author: PatAltimore

articles/blockchain/service/create-member-cli.md

@@ -13,6 +13,10 @@ In this quickstart, you deploy a new blockchain member and consortium in Azure B
 
 [!INCLUDE [quickstarts-free-trial-note](../../../includes/quickstarts-free-trial-note.md)]
 
+## Prerequisites
+
+None.
+
 ## Launch Azure Cloud Shell
 
 The Azure Cloud Shell is a free interactive shell that you can use to run the steps in this article. It has common Azure tools preinstalled and configured to use with your account.

articles/blockchain/service/create-member.md

@@ -13,6 +13,10 @@ In this quickstart, you deploy a new blockchain member and consortium in Azure B
 
 [!INCLUDE [quickstarts-free-trial-note](../../../includes/quickstarts-free-trial-note.md)]
 
+## Prerequisites
+
+None.
+
 ## Create a blockchain member
 
 An Azure Blockchain Service member is a blockchain node in a private consortium blockchain network. When provisioning a member, you can create or join a consortium network. You need at least one member for a consortium network. The number of blockchain members needed by participants depends on your scenario. Consortium participants may have one or more blockchain members or they may share members with other participants. For more information on consortia, see [Azure Blockchain Service consortium](consortium.md).