Add redis port variable

.env.example

@@ -25,6 +25,7 @@ NGINX_VERSION=latest
 
 # redis
 REDIS_PASSWORD=changeme
+REDIS_PORT=6379
 
 # volumes on host
 NGINX_CONF_DIR=./nginx

docker-compose.yml

@@ -113,4 +113,4 @@ services:
     command: redis-server --requirepass ${REDIS_PASSWORD}
     restart: always
     ports:
-      - 6379:6379
+      - ${REDIS_PORT:-6379}:6379