Not able to install unzip tool in my container

I try to install unzip in my centos container.

My Dockerfile looks like this:

FROM centos
...

RUN apt-get update -y && apt-get upgrade -y
RUN apt-get install -y unzip

When I build the image, I get the error:

Step 9/12 : RUN apt-get update -y && apt-get upgrade -y
 ---> Running in 65457527bac0
/bin/sh: apt-get: command not found

How can I install unzip tool in my container?

Source: Docker Questions