Do not execute the postinstall hook

[julianduque]

A lot of people use the postinstall hook to execute grunt related tasks and this is being executed on the build server causing issues, we should ignore this hook on our platform

[3rd-Eden]

Why not just fix these issues? I can image that a postinstall hook would be used to compile dependencies of browserify packages etc. Removing that could cause issues with apps that actually depend on this hook to be working. Another use case was our handbook, which executed the blacksmith binary in order to build the site
when it got deployed.

[julianduque]

So this need to be executed on the drone instead of the build server, ignore postinstall on module-foundry and add it to solenoid instead