new: [myc-update] install and manage ``cron`` scripts.

Added the ``check-fix`` script to check for 2 docker bugs.

bin/myc-update

@@ -53,4 +53,10 @@ Wrap -d "Updating some docker images" <<EOF || exit 1
 docker pull docker.0k.io/letsencrypt
 EOF
 
+Wrap -d "Updating cron scripts" <<EOF || exit 1
+ln -sfn /opt/apps/myc-manage/etc/cron.d/* /etc/cron.d/
+find -L /etc/cron.d -maxdepth 1 -type l -ilname /opt/apps/myc-manage/etc/cron.d/\* -delete
+EOF
+
+
 printf "Update finished ${GREEN}successfully${NORMAL} ${GRAY}(in %.2fs)${NORMAL}.\n" "$((SECONDS - start))"

etc/cron.d/check-fix

@@ -0,0 +1,7 @@
+SHELL=/bin/bash
+PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
+
+*/15 * * * *   root   vps check-fix -s -c container-aliveness 2>&1 | logger -t check-fix
+*/5 * * * *   root   vps check-fix -s -c no-matching-entries rocketchat 2>&1 | logger -t check-fix
+
+