add separate redis service without persistence

docker-compose.yml

@@ -31,7 +31,7 @@ services:
     ports:
       - "4000:4000"
     depends_on:
-      - redis
+      - redis-no-persistence
     environment:
       <<: *common-server-environment
 
@@ -42,7 +42,7 @@ services:
     build: .
     command: npm run test
     depends_on:
-      - redis
+      - redis-no-persistence
     environment:
       <<: *common-server-environment
 
@@ -52,3 +52,12 @@ services:
     image: redis:alpine
     ports:
       - "6379:6379"
+    volumes:
+      - ./redis.conf:/usr/local/etc/redis/redis.conf
+    command: redis-server /usr/local/etc/redis/redis.conf
+
+  redis-no-persistence:
+    image: redis:alpine
+    ports:
+      - "6379:6379"
+