Update information about mybinder.org ownership

[choldgraf]

This adds some information about the mybinder.org domain to our shared infrastructure page, to make it clearer who owns / controls what. It also notes that I am the current owner of mybinder.org and makes it clear that this is not what we want for a long-term solution!

I am still trying to switch the contact email for mybinder.org's registration from my personal email to [email protected]. But the confirmation doesn't seem to be coming through. Will follow up on that.

Long-term, we also discussed that we should probably use an email for mybinder.org that has fewer people on it than the entire Binder team, so that we can minimize potential security risks there (since that email can be used to confirm potentially damaging actions like changing that URL's DNS provider). But for now, I just switched the contact email to [email protected] since we're also using that as a contact for other shared services like LetsEncrypt

part of #424 closes #427

Tasks to complete

• Confirm that [email protected] is now the contact for the registrar
• Get approval in this PR about the language

[choldgraf]

I've approved the ICANN contact info change request for both my old email, and for the new binder-team email!

[consideRatio]

This LGTM, I added a suggestion that is perhaps a slight feature creep but felt quite related.

[choldgraf]

OK I see lots of approvals, so I am going to merge this one!