Failing to set net.core.rmem_max and net.core.wmem_max

[Undrog]

I noticed the following errors during the bake process:

#101 [stage-12 6/9] RUN echo "net.core.rmem_max = 67108864" >> /etc/sysctl.conf   && echo "net.core.wmem_max = 67108864" >> /etc/sysctl.conf   && sysctl -p
#101 0.302 sysctl: error: 'net.core.rmem_max' is an unknown key
#101 0.304 sysctl: error: 'net.core.wmem_max' is an unknown key
#101 DONE 0.3s

From what I've read, this is a global kernel network setting that is not namespaced and thus is not exposed to the container to be set.

If that's right, I guess configuring this optimization needs to be done separately from running/building the container on the docker host. Is that right, or am I missing something?

If that's right, it might be useful to add this to the NOTES section of the README as an optional optimization.