Missing yum clean all after yum install DOK-P1000
Performance
Minor
Not cleaning cached package data after installation can result in higher image sizes. It is always recommended to clean the cached packages after installing them.
Please note that the clean-up must be performed in the same RUN step as it creates a separate layer. Doing this in a separate RUN command would therefore result in a new layer, which will not help reduce the image size.
Bad Practice
RUN yum install -y httpd-2.24.2
Recommended
RUN yum install -y httpd-2.24.2 && yum clean all