Update sources with project sunset header

[travier]

Minor updates and sunset header addition for https://www.projectatomic.io/.

After this PR, I think we should do the following:

• close all the remaining issues here as we are unlikely to ever come back to them
• archive this repo

We should also consider updating the link to the website in this repo to https://www.projectatomic.io/ (it's currently http://projectatomic.io/) or consider switching the website from www to the root domain for GitHub Pages.

[travier]

Note that this is a PR to the source to reflect what's already deployed.

[jberkus]

tag @jasonbrooks on the redirect ... is that something we can do?

[travier]

I'll see with the contact I already have if we can make it happen.

[mscherer]

Everything already point to github:

[misc@windgrace ~]$ host projectatomic.io
projectatomic.io has address 185.199.110.153
projectatomic.io has address 185.199.108.153
projectatomic.io has address 185.199.109.153
projectatomic.io has address 185.199.111.153
projectatomic.io has IPv6 address 2606:50c0:8002::153
projectatomic.io has IPv6 address 2606:50c0:8003::153
projectatomic.io has IPv6 address 2606:50c0:8000::153
projectatomic.io has IPv6 address 2606:50c0:8001::153
projectatomic.io mail is handled by 20 mx2.redhat.com.
projectatomic.io mail is handled by 10 mx1.redhat.com.
[misc@windgrace ~]$ host www.projectatomic.io
www.projectatomic.io is an alias for projectatomic.github.io.
projectatomic.github.io has address 185.199.109.153
projectatomic.github.io has address 185.199.111.153
projectatomic.github.io has address 185.199.110.153
projectatomic.github.io has address 185.199.108.153
projectatomic.github.io has IPv6 address 2606:50c0:8003::153
projectatomic.github.io has IPv6 address 2606:50c0:8000::153
projectatomic.github.io has IPv6 address 2606:50c0:8001::153
projectatomic.github.io has IPv6 address 2606:50c0:8002::153

[travier]

Thanks! the missing piece was on my side. All fixed now. We can mass close and archive the repo.