Docsp 21235 (#318)

* update image

* quickstart updates

* pngquant

* nits

Author: terakilobyte

source/includes/figures/atlas_connection_copy_string.png

@@ -157,18 +157,18 @@ instructions on how to format your connection string.
 
 To retrieve your connection string for the instance and user you created in
 the previous step, log into your Atlas account and navigate to the
-**Clusters** section and click the **Connect** button for the cluster that you
+:guilabel:`Database` section and click the :guilabel:`Connect` button for the cluster that you
 want to connect to as shown below.
 
 .. figure:: /includes/figures/atlas_connection_select_cluster.png
    :alt: The connect button in the clusters section of the Atlas UI
 
-Proceed to the **Connect Your Application** step and select the Node.js
+Proceed to the :guilabel:`Connect Your Application` step and select the Node.js
 driver. Select the :guilabel:`Connection String Only` tab and click the
 :guilabel:`Copy` button to copy the *connection string* to your clipboard
 as shown below.
 
-.. figure:: /includes/figures/atlas_connection_copy_string.png
+.. figure:: /includes/figures/atlas_connection_copy_string_node.png
    :alt: The connection string copy button in the Connection String Only tab of the Atlas UI
 
 Save your connection string to a safe location that you can access in the