add crontab file

dockerfile

@@ -1,4 +1,10 @@
-FROM mysql:latest
+FROM mysql:8-debian
-COPY backup.sh /usr/local/bin/
+RUN apt-get update --allow-unauthenticated --allow-insecure-repositories
-RUN chmod +x /usr/loca/bin/backup.sh
+RUN apt-get -y install -qq --force-yes cron
-CMD ["cron","-f"]
+RUN echo "Log Start" >> /var/log/cron.log
+RUN mkdir /backup
+ADD backup.sh /usr/local/bin/
+ADD mysqlCron /etc/cron.d/mysqlCron
+RUN chmod 0644 /etc/cron.d/mysqlCron
+RUN chmod 0744 /usr/local/bin/backup.sh
+CMD cron && tail -f /var/log/cron.log

mysqlCron

@@ -0,0 +1 @@
+50 23 * * * backup.sh >> /var/log/cron.log 2>&1