DEVEXP-587 : Update README to include an example for connecting to MarkLogic Cloud

Author: anu3990

README.md

@@ -37,9 +37,9 @@ collection into the Documents database using MarkLogic's built-in REST server
 at port 8000:
 
 ```javascript
-var marklogic = require('marklogic');
+const marklogic = require('marklogic');
 
-var db = marklogic.createDatabaseClient({
+const db = marklogic.createDatabaseClient({
   host:     'localhost',
   port:     '8000',
   database: 'Documents',
@@ -48,6 +48,17 @@ var db = marklogic.createDatabaseClient({
   authType: 'DIGEST'
 });
 
+// For MarkLogic Cloud
+const db = marklogic.createDatabaseClient({
+    apiKey:   'changeme',
+    host:     'example.beta.marklogic.com',
+    authType: 'cloud',
+    // basePath is optional.
+    basePath: '/marklogic/test',
+    // accessTokenDuration (in seconds) is optional and can be used to customize the expiration of the access token.
+    accessTokenDuration: 10
+});
+
 db.createCollection(
   '/books',
   {author: 'Beryl Markham', ...},

examples/marklogic-cloud-connection.js

@@ -19,17 +19,18 @@ and writes a document in database - Documents */
 
 const marklogic = require('../');
 
-let db = marklogic.createDatabaseClient({
+const db = marklogic.createDatabaseClient({
     // The below key-value pairs are required
-    apiKey:     'apiKey',
-    host:     'example.marklogic.com',
+    apiKey:     'changeme',
+    host:     'example.beta.marklogic.com',
     authType: 'cloud',
-    basePath: 'basePath',
-    // accessTokenDuration is optional and can be used to customize the expiration of the access token.
+    // basePath is optional.
+    basePath: '/marklogic/test',
+    // accessTokenDuration (in seconds) is optional and can be used to customize the expiration of the access token.
     accessTokenDuration: 10
 });
 
-let writeObject = {
+const writeObject = {
     uri: '/write/string1.json',
     contentType: 'application/json',
     content: '{"key1":"value 1"}'