docs: updated luminous command

Documentation/client.md

@@ -8,9 +8,10 @@ If you don't yet have a Rook cluster running, refer to our [Quickstart Guides](.
 - Standalone: [Download the binary](standalone.md#rook-client-tool) to your client machine.
 
 ## Block Storage
-1. Create a new volume image (10MB)
+1. Create a new pool and volume image (10MB)
 
     ```bash
+    rookctl pool create --name rbd
     rookctl block create --name test --size 10485760
     ```
 

INSTALL.md

@@ -9,7 +9,7 @@ three different platforms for building:
 
 ## Build Requirements
 
-An Intel-based machine (recommend 2+ cores, 8+ GB of memory and 128GB of SSD).
+An Intel-based machine (recommend 2+ cores, 8+ GB of memory and 128GB of SSD). Inside your build environment (Docker for Mac or a VM), 6+ GB memory is also recommended.
 
 The following tools are need on the host:
   - curl