Add requirements to README

Author: banker

README.adoc

@@ -27,6 +27,7 @@ Trino is a distributed SQL engine designed to query large data sets across one o
 == Table of Contents
 
 * link:#background[Background]
+* link:#requirements[Requirements]
 * link:#quick-start[Quick start]
 * link:#installation[Installation]
 * link:#Usage[Usage]
@@ -39,6 +40,16 @@ Redis is an in-memory data store designed to serve data with the fastest possibl
 
 We built the {name} connector so that you can query Redis using SQL. This is useful for any application compatible with JDBC. For example, {name} lets you query and visualize your Redis data from Tableau.
 
+== Requirements
+
+{name} requires a Redis deployment that includes https://redis.io/docs/stack/search/https://redis.io/docs/stack/search/[RediSearch]. RediSearch is a https://redis.io/docs/reference/modules/[Redis module] that adds querying and secondary indexing to Redis.
+
+Redis deployments that bundle RediSearch include:
+
+* https://redis.com/try-free/[Redis Cloud]: Fully-managed, enterprise-grade Redis deployed on AWS, Azure, or GCP.
+* https://redis.com/redis-enterprise-software/overview/[Redis Enterprise]: Enterprise-grade Redis for on-premises and private cloud deployment.
+* https://redis.io/docs/stack/[Redis Stack]: Redis distribution that includes RediSearch, RedisJSON, RedisGraph, RedisTimeSeries, and RedisBloom.
+
 == Quick start
 
 To understand how {name} works, it's best to try it for yourself. View the screen recording or follow the steps below: