add docker note (#147)

Author: jordan-smith721

Diff for: source/connect/connection-targets.txt

@@ -124,6 +124,10 @@ by using the ``replica_set`` option or the ``replicaSet`` connection string opti
    :end-before: end-replica-set-option
    :dedent:
 
+.. note:: Replica Set in Docker
+
+   .. sharedinclude:: dbx/docker-replica-set.rst
+
 API Documentation
 -----------------