changed to supercronic

Dockerfile

@@ -1,5 +1,5 @@
 from alpine:latest
-RUN apk add --no-cache curl
+RUN apk add --no-cache curl,supercronic
 COPY crontab opt
 COPY entrypoint.sh opt
 COPY phc.sh opt

crontab

@@ -1 +0,0 @@
-*/30 * * * * . /etc/environment; sh /opt/phc.sh >> /logfile

entrypoint.sh

@@ -1,5 +1,10 @@
 #!/bin/sh
+CRON_CONFIG_FILE="/opt/crontab"
 
-printenv | grep -v "no_proxy" >> /etc/environment
+# CRON
+get_env CRON
+CRON="${CRON:-"5 * * * *"}"
 
-crond -f
+echo "${CRON} sh /opt/phc.sh" >> "${CRON_CONFIG_FILE}"
+
+exec supercronic -passthrough-logs -quiet "${CRON_CONFIG_FILE}"