added dev container; changed image to alpine/mysql on cron backup

jobs/backup/backup-cronjob.yaml

@@ -20,14 +20,15 @@ spec:
                 requests:
                   memory: "256Mi"
                   cpu: "250m"
-              image: bitnami/mysql:latest
-              command: ["bash", "-c"]
+              image: alpine/mysql
+              command: ["sh", "-c"]
               args:
                 - |
                   set -e
                   mkdir -p /data/mariadb-export
                   echo "TRACE: Exporting database"
-                  mysqldump --column-statistics=0 -u ${MYSQL_USER} -h ${MYSQL_HOST} ${MYSQL_DB} > /data/mariadb-export/backup.sql
+                  #mysqldump --column-statistics=0 -u ${MYSQL_USER} -h ${MYSQL_HOST} ${MYSQL_DB} > /data/mariadb-export/backup.sql
+                  mysqldump -u ${MYSQL_USER} -h ${MYSQL_HOST} ${MYSQL_DB} > /data/mariadb-export/backup.sql
                   echo "TRACE: Exporting database finished"
             
               env: