C8Run supported environments (glibc)

[jessesimpson36]

We learned earlier that as a golang application, c8run has a dependency on GLIBC. From my testing,

 linux distro      |  glibc version   |  errors?    
-----------------------------------------------
ubuntu 20.04:      |  libc6 == 2.31   |  errors
ubuntu 22.04:      |  libc6 == 2.35   |  works
ubuntu 24.04 (GHA) |  libc6 == 2.39   |  works

libc6 is the package name in ubuntu for glibc.

We need to include this in the Supported Environments page. we may need to think about how this is presented to the user. Do we say that ubuntu 22 and ubuntu 24 are supported but not 20 ? do we tell people which versions of glibc are supported / how to tell what version of glibc you have per each environment? I'm not sure the best approach yet.

[hisImminence]

As a first iteration, how about we add in Prerequisites in the C8install section:

• if ubuntu, 22+

Maybe moving forward we find a way to include the package into the build?