Merge pull request #45425 from ktothill/TELCODOCS-428

TELCODOCS-428: Update RAM in Minimum resource requirements

Author: michaelryanpeter

modules/install-sno-requirements-for-installing-on-a-single-node.adoc

@@ -9,15 +9,15 @@ Installing {product-title} on a single node alleviates some of the requirements
 
 * *Administration host:* You must have a computer to prepare the ISO, to create the USB boot drive, and to monitor the installation.
 
-* *Bare metal installation:* Installing {product-title} on a single node on bare metal requires that you specify the `platform.none: {}` parameter in the `install-config.yaml` configuration file.
+* *Supported platforms:* Installing {product-title} on a single node is supported on bare metal, vSphere, Red Hat OpenStack, and Red Hat Virtualization platforms. In all cases, you must specify the `platform.none: {}` parameter in the `install-config.yaml` configuration file.
 
 * *Production-grade server:* Installing {product-title} on a single node requires a server with sufficient resources to run {product-title} services and a production workload.
 +
 .Minimum resource requirements
 [options="header"]
 |====
 |Profile|vCPU|Memory|Storage
-|Minimum|8 vCPU cores|32GB of RAM| 120GB
+|Minimum|8 vCPU cores|16GB of RAM| 120GB
 |====
 +
 [NOTE]
@@ -40,4 +40,4 @@ The server must have a Baseboard Management Controller (BMC) when booting with v
 |Ingress route|`*.apps.<cluster_name>.<base_domain>`| Add a wildcard DNS A/AAAA or CNAME record that targets the node. This record must be resolvable by clients external to the cluster.
 |====
 +
-Without persistent IP addresses, communications between the `apiserver` and `etcd` might fail.
+Without persistent IP addresses, communications between the `apiserver` and `etcd` might fail.