Add more system details to userAgent

Author: Daniel Climent

src/index.js

@@ -3,15 +3,25 @@ import pWaitFor from 'p-wait-for'
 import { getMethods } from './methods/index.js'
 import { openApiSpec } from './open_api.js'
 import { getOperations } from './operations.js'
+import { version } from './package.json';
 
 export class NetlifyAPI {
   constructor(firstArg, secondArg) {
     // variadic arguments
     const [accessTokenInput, opts = {}] = typeof firstArg === 'object' ? [null, firstArg] : [firstArg, secondArg]
 
+		const nodeVersion = process.version
+
+		var systemOS = process.platform;
+		if systemOS  == "darwin" {
+			systemOS = "MacOS"
+		} else if systemOS == "win32" || systemOS == "win64" {
+			systemOS = "Winodws"
+		}
+
     // default opts
     const {
-      userAgent = 'netlify/js-client',
+      userAgent = `netlify/js-client ${version}; nodejs version ${nodeVersion}; OS: ${systemOS}`,
       scheme = openApiSpec.schemes[0],
       host = openApiSpec.host,
       pathPrefix = openApiSpec.basePath,