chore(docker): update Redis service configuration in docker-compose.yml

- Changed the default host port for Redis from 6379 to 6380 to avoid conflicts with the host's Redis instance.
- Updated the corresponding environment variable from REDIS_PORT to REDIS_HOST_PORT for clarity.

Author: angoca

docker/docker-compose.yml

@@ -64,13 +64,13 @@ services:
       timeout: 5s
       retries: 5
 
-  # Redis Cache
+  # Redis Cache (host port defaults to 6380 to avoid conflict with host Redis on 6379)
   redis:
     image: redis:7-alpine
     container_name: osm-notes-redis
     command: redis-server --appendonly yes --requirepass ${REDIS_PASSWORD:-}
     ports:
-      - '${REDIS_PORT:-6379}:6379'
+      - '${REDIS_HOST_PORT:-6380}:6379'
     volumes:
       - redis_data:/data
     restart: unless-stopped