Update Docker Configuration and Base Image

[arkaprovob]

Made several key improvements to our Docker setup to enhance performance, usability, and security:

1. Dockerfile Refactoring:

   • The Dockerfile has been refactored to minimize the number of layers. This change will make the build process more efficient and reduce the overall image size.

2. Editor and Utilities Update:

   • Added vim as the default editor for editing files inside the container. This will improve the user experience for developers who are accustomed to using vim.
   • Included coreutils to provide essential utilities such as ln and other basic commands. This ensures that our container has the necessary tools for fundamental operations.

3. Base Image Update for Security:

   • The base image of the Docker container has been updated. This change addresses and mitigates known vulnerability issues, enhancing the security of our containerized application.

[kunyan]

I think the core reason for this change are upgrade RHEL8 to RHEL9.
I'm OK with all the changes.

Just a small suggestion. we only need this image with a stable runtime
We should follow KISS principle

Forgive me don't know the other reasons for all of changes. please merge it if it needed

[kunyan]

If there are no important dependency requirement, I still recommend use the UBI minimal image.

Name	Size	Uncompressed Size
ubi9	74.5 MB	206.9 MB
ubi9-minimal	36.1 MB	92.9 MB

Less size means less code and less security leak.
I think ubi8-mininal has been verified all features we need are supported.

PS: I have't check if there has any duplicate packages had been installed in ubi base image, but will install again along with httpd installation.

IMO, this is not a big problem, but we should choose the better one for our situation

[arkaprovob]

Are you talking about this ?
registry.access.redhat.com/ubi9/ubi-minimal:9.2-750.1696515534

[kunyan]

Yes, this is the latest version of ubi9 minimal https://catalog.redhat.com/software/containers/ubi9-minimal/61832888c0d15aff4912fe0d?architecture=amd64&image=651ecb34cd44fe7d45c78c47&container-tabs=overview

[arkaprovob]

registry.access.redhat.com/ubi9-minimal:9.2-750.1696515534