remove unnecessary entries from compose file

- Named volumes were still present (but unused) from a previous commit.
- A network was explicitly defined, but was not necessary as all services are
  added to a default bridge network already.
- Remove host port mapping for redis container as the statistics service
  accesses it directly (not through the host). This is also improves security.

src/docker-compose.yml

@@ -16,8 +16,6 @@ services:
       start_interval: 10s
       interval: 30s
       retries: 5
-    networks:
-      - streamline
 
   statistics:
     image: registry.gitlab.com/signalytic/client-external/streamline/streamline-emr/statistics/arm64:2.3
@@ -29,29 +27,15 @@ services:
     depends_on:
       - streamline-emr
       - redis
-    networks:
-      - streamline
 
   redis:
     image: registry.gitlab.com/signalytic/client-external/streamline/streamline-emr/redis/arm64:2.3
     container_name: streamline-emr-redis
     restart: unless-stopped
-    ports:
-      - "${REDIS_PORT:-6379}:6379"
     volumes:
       - "${REDIS_DATA_DIR:-./redis_data}:/data"
-    networks:
-      - streamline
     healthcheck:
       test: ["CMD", "redis-cli", "ping"]
       interval: 30s
       timeout: 10s
-      retries: 3
-
-volumes:
-  statistics_data:
-  redis_data:
-
-networks:
-  streamline:
-    driver: bridge
+      retries: 3