first commit

backup/backup.sh

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+#!/bin/bash
+DATE=$(date +"%Y-%m-%d_%H-%M")
+FILENAME="backup_$DATE.sql"
+
+echo "Dumping database to $FILENAME"
+
+/usr/bin/pg_dump \
+-h postgres-db \
+-U auction \
+auctiondb \
+> /backup/$FILENAME
+
+  # optional: keep only 14 days
+find /backup -type f -mtime +14 -delete

backup/docker-compose.yml

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+version: "3.9"
+
+services:
+  pgbackup:
+    image: postgres:16
+    container_name: postgres-backup
+    restart: unless-stopped
+
+    environment:
+      PGPASSWORD: ${POSTGRES_PASSWORD}
+
+    volumes:
+      - ../postgres/backup:/backup
+      - ./backup.sh:/backup.sh
+
+    entrypoint: [ "bash", "-c", "echo 'Starting backup scheduler'; while true; do /backup.sh; sleep 86400; done" ]
+
+    networks:
+      - default