Dockerfile

@@ -1,5 +1,5 @@
 FROM alpine:latest
 COPY . opt
-RUN apk add --no-cache supercronic
+RUN apk add --no-cache cronie
 RUN chmod +x /opt/entrypoint.sh
 CMD ["/opt/entrypoint.sh"]

entrypoint.sh

@@ -1,7 +1,5 @@
 #!/bin/sh
 
-CRON_CONFIG_FILE="/opt/crontab"
+CRON_CONFIG_FILE="/etc/crontabs/root"
 
-echo "${CRON} echo Come in the water is fine. >/dev/null" > $CRON_CONFIG_FILE
+echo "${CRON} echo "Come in the water is fine!" > /opt/output.log" > $CRON_CONFIG_FILE
-
-exec supercronic -passthrough-logs -quiet $CRON_CONFIG_FILE