added logrotate and crond entrypoint

docker/Dockerfile

@@ -1,5 +1,9 @@
 FROM alpine:3.16
+
+COPY logrotate-cron /etc/logrotate.d
+
 RUN \
-  apk -U add python3 py3-pip py3-requests py3-dateutil py3-beautifulsoup4 && \
+  apk -U add python3 py3-pip py3-requests py3-dateutil py3-beautifulsoup4 logrotate && \
   pip3 install fdb mysql-connector-python==8.0.29 telepot caldav
 
+ENTRYPOINT ["/usr/sbin/crond", "-f", "-d8", "-L", "/var/log/cron.log"]

docker/logrotate-cron

@@ -0,0 +1,8 @@
+/var/log/cron.log {
+	rotate 4
+	compress
+	delaycompress
+	missingok
+	notifempty
+	sharedscripts
+}