Add c/c++ base image based on...

[nickboldt]

Add c/c++ base image based on registry.centos.org/centos/devtoolset-7-toolchain-centos7; reorder containers in alpha sequence because yeah

Ref: eclipse-che/che#13698

Change-Id: I8d95000f756b948d29a6c935163097ccc44ade53
Signed-off-by: nickboldt nboldt@redhat.com

[nickboldt]

Note that we could also use https://access.redhat.com/containers/?architecture&tab=docker-file#/registry.access.redhat.com/devtools/llvm-toolset-rhel7/images/7.0.1-34

but that's RHEL7, not UBI8, so not sure if there's much value-add there.

This PR blocks #73

[amisevsk]

Although for the main public repo I might prefer the centos-based image.

[amisevsk]

Also, almost forgot but make sure the image repo is created in the quay org before merging.

[nickboldt]

All things being equal, "I might prefer" the one I don't have to fork for productizing. :)

Any technical reasons to prefer the unsupported community version instead of the officially supported one, with all the bonus CVE fixin's?

[amisevsk]

Hey now, I approved the PR :)

Any technical reasons to prefer the unsupported community version instead of the officially supported one, with all the bonus CVE fixin's?

Fear of RHEL/redistributing + historical process of "centos for public, rhel for subscription"? Mostly kidding, though using RHEL images in a freely re-distributable form is a relatively recent thing.

I went ahead and created https://quay.io/repository/eclipse/che-cpp-rhel7 to not block merging.