try to implement the global containerization

docker/backup/backup_db.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+
+BACKUP_DIR="/backups"
+
+mkdir -p "$BACKUP_DIR"
+
+DAY=$(date +%d)
+FILE="$BACKUP_DIR/$DAY.sql"
+
+mysqldump -h mariadb -u "$DB_USERNAME" -p"$DB_PASSWORD" "$DB_DATABASE" > "$FILE" 2>/dev/null
+
+if [ $? -eq 0 ]; then
+  echo "[$(date)] Backup $DB_DATABASE sauvegardé dans $FILE" >> "$BACKUP_DIR/backup.log"
+else
+  echo "[$(date)] ERREUR lors du backup de $DB_DATABASE" >> "$BACKUP_DIR/backup.log"
+fi