reworked how it enters

Dockerfile

@@ -1,30 +1,27 @@
-# === Dockerfile ===
 FROM ghcr.io/linuxserver/duplicati:2.1.0
 
-# Remove old docker
-RUN for pkg in docker.io docker-doc docker-compose docker-compose-v2 podman-docker containerd runc; do apt-get remove $pkg; done
 # Install Docker CLI + bash + core utilities
-RUN apt-get update \
-  && apt-get install ca-certificates curl \
-  && install -m 0755 -d /etc/apt/keyrings \
-  && curl -fsSL https://download.docker.com/linux/ubuntu/gpg -o /etc/apt/keyrings/docker.asc \
-  && chmod a+r /etc/apt/keyrings/docker.asc \
-  && echo \
-  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/ubuntu \
-  $(. /etc/os-release && echo "${UBUNTU_CODENAME:-$VERSION_CODENAME}") stable" | \
-  tee /etc/apt/sources.list.d/docker.list > /dev/null \
-  && apt-get update
-
-
-
-RUN apt-get -y install docker-ce docker-ce-cli \
-  && containerd.io docker-buildx-plugin docker-compose-plugin postrgres17 \
-  && mkdir -p /backups
+RUN apt-get -y update \
+  && apt-get -y --no-install-recommends install \
+  cron \
+  bash \
+  ca-certificates \
+  curl \
+  docker-ce-cli \
+  postrgres17 \
+  && mkdir -p /backups \
+  && rm -rf /var/lib/apt/lists/*
 
 # Copy backup script
-COPY backup.sh /usr/local/bin/backup.sh
-RUN chmod +x /usr/local/bin/backup.sh
+COPY backup.sh /usr/local/bin/backup.sh \
+  && backup.cron /etc/cron.d/backup \ 
+  && startup.sh /usr/local/bin/startup.sh /
+
+RUN chmod +x /usr/local/bin/backup.sh \
+  && chmod 0644 /etc/cron.d/backup \
+  && crontab /etc/cron.d/backup \
+  && chmod +x /usr/local/bin/startup.sh
 
 # Use bash as default
-ENTRYPOINT ["/usr/local/bin/backup.sh"]
+ENTRYPOINT ["/usr/local/bin/startup.sh"]
 

backup.cron

@@ -0,0 +1,3 @@
+# Run backup.sh once every 24 hours at 3:00 AM
+0 3 * * * /usr/local/bin/backup.sh >> /var/log/backup.log 2>&1
+

backup.sh

@@ -5,7 +5,6 @@
 
 # === CONFIGURATION ===
 BACKUP_DIR="/backups/postgres_dumps"
-INTERVAL_HOURS="${INTERVAL_HOURS:-24}" # Default to 24 hours if not set
 RETENTION_DAYS="${RETENTION_DAYS:-7}" # Keep 7 days of backups
 
 # List of known image name patterns
@@ -22,7 +21,6 @@ EOF
 echo "[INFO] Starting PostgreSQL backup service..."
 mkdir -p "$BACKUP_DIR"
 
-while true; do
 TIMESTAMP=$(date +'%Y-%m-%d_%H-%M-%S')
 echo "[INFO] $(date) - Starting backup cycle ($TIMESTAMP)"
 echo "[INFO] Checking for running Postgres containers..."
@@ -68,6 +66,3 @@ while true; do
 btrfs subvolume snapshot -r /source/appdata /backups/snapshots/$(hostname)-$(date +%F)
 
 echo "[INFO] Backup cycle complete."
-  echo "[INFO] Sleeping for ${INTERVAL_HOURS}h..."
-  sleep "${INTERVAL_HOURS}h"
-done