add docker note (#253) (#254)

(cherry picked from commit e92f115)

Co-authored-by: Jordan Smith <[email protected]>

Author: github-actions[bot]

source/connect/connection-targets.txt

@@ -103,6 +103,10 @@ hosts, including ``host1``:
    uri = "mongodb://host1:27017/?replicaSet=sampleRS"
    client = MongoClient(uri)
 
+.. note:: Replica Set in Docker
+
+   .. sharedinclude:: dbx/docker-replica-set.rst
+
 {+driver-short+} evenly load balances operations across deployments that are reachable
 within the client's ``localThresholdMS`` value. To learn more about how {+driver-short+} load
 balances operations across multiple MongoDB deployments, see the