fix: adds redis to example compose.yml

docs/examples/compose.yml

@@ -82,6 +82,15 @@ services:
       timeout: 10s
       retries: 10
 
+  redis:
+    image: redis:latest
+    volumes:
+      - redis_data:/data
+    command: redis-server --maxmemory 512MB
+    restart: unless-stopped
+
+  # **Optional**
+  # Provides a simple method of viewing the database
   adminer:
     image: adminer
     ports:
@@ -91,3 +100,4 @@ volumes:
   mysql:
   mercure_config:
   mercure_data:
+  redis_data: