Adjusted .env and added readme comment

Author: AyronK

examples/redis-minimal/.env

@@ -1,3 +1,3 @@
 NEXT_PRIVATE_DEBUG_CACHE="1"
 REDIS_URL="redis://localhost:6379"
-REDIS_SINGLE_CONNECTION=true
+REDIS_SINGLE_CONNECTION=false

examples/redis-minimal/README.md

@@ -6,6 +6,7 @@ First, run the development server:
 
 ```bash
 npm i
+npm run build # important to run once to create cacheHandler dist file
 npm run dev
 ```