fix: use dragonfly.env for dragonfly specific environment

.env.example

@@ -105,7 +105,3 @@ SFTP_VOLUME_DATA_DIR=./sftp-data
 
 NAMED_VOLUME_TO_BACKUP=common-mysql-db
 NAMED_VOLUME_TO_RESTORE=common-mysql-db
-
-# =============================================================
-
-DRAGONFLY_PASSWORD=

.envs/dragonfly.example.env

@@ -0,0 +1,4 @@
+# Use DFLY as prefix for any command as envoronment variable
+# Reference: https://github.com/dragonflydb/dragonfly/discussions/2089
+# Commands: https://www.dragonflydb.io/docs/managing-dragonfly/flags
+DFLY_requirepass=dragonflypass

docker-compose.override.dragonfly.yml

@@ -7,9 +7,10 @@ services:
 
   dragonfly:
     image: 'docker.dragonflydb.io/dragonflydb/dragonfly'
+    env_file:
+      - .envs/dragonfly.env
     ulimits:
       memlock: -1
-    command: ["--requirepass", "${DRAGONFLY_PASSWORD:dragonflypass}"]
     volumes:
       - common-dragonfly-db:/data
     networks: