Use python3, remove go-cron, and use builtin cron

mysql-backup-s3/install.sh

@@ -3,23 +3,14 @@
 # exit if a command fails
 set -e
 
-
 apk update
 
 # install mysqldump
 apk add mysql-client
 
 # install s3 tools
-apk add python py-pip
+apk add python3 py3-pip
 pip install awscli
-apk del py-pip
-
-# install go-cron
-apk add curl
-curl -L --insecure https://github.com/odise/go-cron/releases/download/v0.0.6/go-cron-linux.gz | zcat > /usr/local/bin/go-cron
-chmod u+x /usr/local/bin/go-cron
-apk del curl
-
 
 # cleanup
 rm -rf /var/cache/apk/*

mysql-backup-s3/run.sh

@@ -9,5 +9,6 @@ fi
 if [ "${SCHEDULE}" = "**None**" ]; then
   sh backup.sh
 else
-  exec go-cron "$SCHEDULE" /bin/sh backup.sh
+  echo "$SCHEDULE /bin/sh /backup.sh" > /etc/crontabs/root
+  exec crond -d 8 -f
 fi