DOCSP-48765: docker note (#124)

(cherry picked from commit 400f928)

Author: rustagir

source/connect/connection-targets.txt

@@ -100,6 +100,16 @@ automatic discovery, perform one of the following actions:
 - Specify ``false`` as the value of the ``directConnection`` parameter.
 - Specify more than one host in the replica set.
 
+.. note::
+
+   The ``MongoClient`` constructor is *non-blocking*.
+   When you connect to a replica set, the constructor returns immediately while the
+   client uses background threads to connect to the replica set.
+   
+   If you construct a ``MongoClient`` and immediately print the string representation
+   of its ``nodes`` attribute, the list might be empty while the client connects to
+   the replica-set members.
+
 You can connect to a MongoDB replica set by specifying the members in a 
 ``ConnectionString``. The following example shows how to specify three members 
 of the replica set:
@@ -128,15 +138,9 @@ corresponding to all of the replica set members:
    :end-before: end-replica-set-server-address
    :dedent:
 
-.. note::
+.. note:: Replica Set in Docker
 
-   The ``MongoClient`` constructor is *non-blocking*.
-   When you connect to a replica set, the constructor returns immediately while the
-   client uses background threads to connect to the replica set.
-   
-   If you construct a ``MongoClient`` and immediately print the string representation
-   of its ``nodes`` attribute, the list might be empty while the client connects to
-   the replica-set members.
+   .. sharedinclude:: dbx/docker-replica-set.rst
 
 API Documentation
 -----------------