Update versions of node in docs

Signed-off-by: Dave Kelsey <[email protected]>

docs/vNext/CONTRIBUTING.md

@@ -216,13 +216,13 @@ For developing Caliper, the minimum required version of npm is `7.24.2`. This is
 In case the npm version is not sufficient, the following error may be thrown when trying to install the dependencies:
 
 ```console
-user@ubuntu:~/caliper$ npm ci
+user@ubuntu:~/caliper$ npm install
 npm ERR! code ENOTSUP
-npm ERR! notsup Unsupported engine for [email protected]: wanted: {"node":">=14.19.0","npm":">=7.24.2"} (current: {"node":"14.19.3","npm":"6.14.17"})
+npm ERR! notsup Unsupported engine for [email protected]: wanted: {"node":">=18.19.0","npm":">=7.24.2"} (current: {"node":"14.21.3","npm":"6.14.18"})
 npm ERR! notsup Not compatible with your version of node/npm: [email protected]
 npm ERR! notsup Not compatible with your version of node/npm: [email protected]
-npm ERR! notsup Required: {"node":">=14.19.0","npm":">=7.24.2"}
-npm ERR! notsup Actual:   {"npm":"6.14.17","node":"14.19.3"}
+npm ERR! notsup Required: {"node":">=18.19.0","npm":">=7.24.2"}
+npm ERR! notsup Actual:   {"npm":"6.14.18","node":"14.21.3"}
 ```
 
 If the npm version is lower than `7.24.2`, you can update it to latest by running the following command:

docs/vNext/Installing_Caliper.md

@@ -247,8 +247,8 @@ Let's see the three types of version numbers you will encounter:
 
 ### Pre-requisites
 
-* Node.js v14 LTS or v16 LTS is required to install the Caliper CLI from NPM:
-* Docker version 20.10.11 or later is required for use with the Caliper docker image
+* Node.js v18 LTS or v20 LTS or later LTS version is required to install the Caliper CLI from NPM:
+* Docker engine version 20.10.11 or later is required for use with the Caliper docker image
 
 The following tools may be required depending on which SUT and version you bind to