cron job doesn't run

[pensnarik]

Container runs successfully but cron job doesn't run:

[mutex@asus docker-cron]$ (master)$ docker build . -t cron2
Sending build context to Docker daemon  70.66kB
Step 1/9 : FROM ubuntu:latest
 ---> 4e5021d210f6
Step 2/9 : RUN apt-get update
 ---> Using cache
 ---> 5d1d1ebb5852
Step 3/9 : RUN apt-get install cron
 ---> Using cache
 ---> 10cbf1b3d807
Step 4/9 : ADD crontab /etc/cron.d/simple-cron
 ---> d81455467c1f
Removing intermediate container 6e8f6786c915
Step 5/9 : ADD script.sh /script.sh
 ---> 64f906dcfd33
Removing intermediate container 56863a415a91
Step 6/9 : RUN chmod +x /script.sh
 ---> Running in c0c2a49087ef
 ---> 28c827f0c7bc
Removing intermediate container c0c2a49087ef
Step 7/9 : RUN chmod 0644 /etc/cron.d/simple-cron
 ---> Running in 1e22e04268ed
 ---> 388c7ecfe97e
Removing intermediate container 1e22e04268ed
Step 8/9 : RUN touch /var/log/cron.log
 ---> Running in ee65d6f0ba33
 ---> 23d090297ad0
Removing intermediate container ee65d6f0ba33
Step 9/9 : CMD cron && tail -f /var/log/cron.log
 ---> Running in f5289dbf139d
 ---> 65e72646a4ec
Removing intermediate container f5289dbf139d
Successfully built 65e72646a4ec
Successfully tagged cron2:latest
[mutex@asus docker-cron]$ (master)$ docker run -it cron2

I've been waiting for 5 minutes but nothing happened.