dev: fake static api

[kamilsk]

Motivation: experiments and automation purposes.

PoC

curl install.octolab.org/lookup | jq '.godownloader' | bash -- -b /usr/local/bin

• install.octolab.org/lookup or install.octolab.org/how
• support wget and curl
• friendly for https://github.com/octomation/taskfiles

[kamilsk]

first step

curl -sSf https://install.octolab.org/lookup | jq '.godownloader'
{
  "stub": true
}