add container level test and refine document

[SamYuan1990]

add container test for container runtime install, as GHA locks down gnupg keys and container runtime for ubi.

[SamYuan1990]

@rootfs , I tested with fedora image at local, fails at

yum install -y yum-utils
...
Error Summary
-------------
Disk Requirements:
   At least 6MB more space needed on the / filesystem.

could you please advise as how to install docker https://docs.docker.com/engine/install/fedora/ ?

[SamYuan1990]

[root@82a7c25391e1 /]# ./main.sh 
start install container runtime as docker
install yum utils
Updating Subscription Management repositories.
Unable to read consumer identity

This system is not registered with an entitlement server. You can use subscription-manager to register.

Red Hat Universal Base Image 9 (RPMs) - BaseOS                                  368 kB/s | 515 kB     00:01    
Red Hat Universal Base Image 9 (RPMs) - AppStream                               678 kB/s | 1.8 MB     00:02    
Red Hat Universal Base Image 9 (RPMs) - CodeReady Builder                       304 kB/s | 192 kB     00:00    
Dependencies resolved.
================================================================================================================
 Package                      Architecture       Version                    Repository                     Size
================================================================================================================
Installing:
 yum-utils                    noarch             4.3.0-11.el9_3             ubi-9-baseos-rpms              45 k
Installing dependencies:
 dnf-plugins-core             noarch             4.3.0-11.el9_3             ubi-9-baseos-rpms              42 k

Transaction Summary
================================================================================================================
Install  2 Packages

Total download size: 87 k
Installed size: 45 k
Downloading Packages:
(1/2): dnf-plugins-core-4.3.0-11.el9_3.noarch.rpm                                32 kB/s |  42 kB     00:01    
(2/2): yum-utils-4.3.0-11.el9_3.noarch.rpm                                      9.8 kB/s |  45 kB     00:04    
----------------------------------------------------------------------------------------------------------------
Total                                                                            19 kB/s |  87 kB     00:04     
Running transaction check
Transaction check succeeded.
Running transaction test
The downloaded packages were saved in cache until the next successful transaction.
You can remove cached packages by executing 'yum clean packages'.
Error: Transaction test error:
  installing package dnf-plugins-core-4.3.0-11.el9_3.noarch needs 148KB more space on the / filesystem
  installing package yum-utils-4.3.0-11.el9_3.noarch needs 388KB more space on the / filesystem

Error Summary
-------------
Disk Requirements:
   At least 1MB more space needed on the / filesystem.

config yum repo
./main.sh: line 24: yum-config-manager: command not found
install docker
Updating Subscription Management repositories.
Unable to read consumer identity

This system is not registered with an entitlement server. You can use subscription-manager to register.

Last metadata expiration check: 0:00:06 ago on Thu Apr  4 04:25:07 2024.
No match for argument: docker-ce
No match for argument: docker-ce-cli
No match for argument: containerd.io
No match for argument: docker-buildx-plugin
No match for argument: docker-compose-plugin
Error: Unable to find a match: docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
[root@82a7c25391e1 /]# 

test with ubi locally...confusing...

[SamYuan1990]

use UBI image instead... and use file existing instead check from etc/os-release.

[SamYuan1990]

fix #69

[SamYuan1990]

a part of #65