feat: cron done, admin unfinished

backup/Dockerfile

@@ -1,9 +1,16 @@
 FROM alpine:latest
 
-RUN apk add --no-cache docker-cli bash findutils postgresql-client
+RUN apk add --no-cache docker-cli bash findutils postgresql-client cronie
 
-COPY backup.sh /backup.sh
-RUN chmod +x /backup.sh
+WORKDIR /app
 
-CMD ["/backup.sh"]
+COPY backup.sh crontab.txt ./
+
+RUN chmod +x backup.sh
+
+RUN crontab crontab.txt
+
+RUN touch /var/log/cron.log
+
+CMD ["crond", "-f"]