Update Dockerfile

Dockerfile

@@ -1,8 +1,9 @@
 FROM alpine
 RUN apk --update add curl jq docker-cli
 RUN mkdir -p /opt/cron
-COPY  entrypoint.sh /entrypoint.sh
-COPY  cron-re-read.sh /cron-re-read.sh
+COPY crontab_letsencrypt.txt /opt/cron/crontab.txt
+COPY entrypoint.sh /entrypoint.sh
+COPY cron-re-read.sh /cron-re-read.sh
 COPY service /usr/local/bin/
 RUN chmod a+x /usr/local/bin/service 
 RUN chmod a+x /*.sh