[APM] Update Node.js onboarding instructions (elastic#22562) (elastic…

…#22738)

src/core_plugins/kibana/server/tutorials/apm/apm_client_instructions.js

@@ -30,10 +30,11 @@ export const createNodeClientInstructions = () => [
  textPre:
  'Agents are libraries that run inside of your application process.' +
  ' APM services are created programmatically based on the `serviceName`.' +
- ' This agent supports Express, Koa, hapi, and custom Node.js.',
+ ' This agent supports a vararity of frameworks but can also be used with your custom stack.',
  commands: `// Add this to the VERY top of the first file loaded in your app
 var apm = require('elastic-apm-node').start({curlyOpen}
- // Set required service name (allowed characters: a-z, A-Z, 0-9, -, _, and space)
+ // Override service name from package.json
+ // Allowed characters: a-z, A-Z, 0-9, -, _, and space
  serviceName: '',
 
  // Use if APM Server requires a token