Feat: data persistence in shared volume

implemented a template to enable data persistence even with a shared volume across containers

build/Dockerfile

@@ -1,6 +1,6 @@
 FROM redis:8.6.1
 
-RUN apt update && apt install -y --no-install-recommends gettext && apt clean && rm -rf /var/lib/apt/lists/*
+RUN apt update && apt install -y --no-install-recommends gettext dnsutils && apt clean && rm -rf /var/lib/apt/lists/*
 ADD ./entrypoint.sh /entrypoint.sh
 
 ENTRYPOINT [ "/entrypoint.sh" ]

build/entrypoint.sh

@@ -1,6 +1,10 @@
 #!/bin/sh
 set -e
 
+export CONTAINER_NAME=$(dig -x "$(hostname -i)" +short | cut -d . -f 1)
+mkdir -p /data/$CONTAINER_NAME
+cd /data/$CONTAINER_NAME
+
 if [ "${1%.tmpl}" != "$1" ]; then
     cat "$1" | envsubst > /etc/redis.conf
     set -- /etc/redis.conf