DOCSP-15825 compatibility page (#148)

* added compatibility page

Author: kyuan-mongodb

source/compatibility.txt

@@ -1,5 +1,52 @@
+.. _kafka-compatibility:
+
 =============
 Compatibility
 =============
 
-asdf
+.. default-domain:: mongodb
+
+MongoDB Compatibility
+---------------------
+
+Kafka Sink Connector
+~~~~~~~~~~~~~~~~~~~~
+
+The **Kafka Sink Connector** requires MongoDB 3.6 or later.
+
+Kafka Source Connector
+~~~~~~~~~~~~~~~~~~~~~~
+
+The **Kafka Source Connector** requires MongoDB 3.6 or later. 
+
+If you are using MongoDB 3.6, the connector can only listen for
+changes on **collections**. If you need the connector to listen for
+changes on a **database** or **deployment**, you must use
+MongoDB 4.0 or later.
+
+.. note::
+
+   We recommend that you only use the {+mkc+} with an official version
+   of the MongoDB server. We cannot guarantee it functions correctly
+   with any other version.
+
+Kafka Compatibility
+-------------------
+
+The **{+mkc+}** requires Kafka Connect version 2.1.0 or later. It's
+tested against Apache Kafka 2.3 and later. You can use the Kafka
+Connect service with several Apache Kafka compatible platforms including
+the following:
+
+- Confluent Platform 5.3 or later
+- Microsoft Azure Event Hubs
+- Red Hat AMQ Streams
+
+The {+mkc+} works directly with Kafka Connect. The connector does not
+connect directly to a Kafka cluster which means it's compatible with any
+Apache Kafka platform that supports Kafka Connect.
+
+If you have any questions about the {+mkc+}, feel free to ask them on
+the `MongoDB Community Forums
+<https://www.mongodb.com/community/forums/c/connectors-integrations/>`__.
+