Company Branded: Add post-install scripting capabilities

[tresf]

Company Branded versions may need to add scripting capabilities, e.g. special firewall rules, file copy, etc. The installer should support a post-installation script for custom deployments.

[Vzor-]

We should pass on some env vars to the script. Some useful props to pass:

• user qz space
• shared qz space
• qz version
• os/arch
• install location

[tresf]

Implemented and ready for testing here: #1190

We should pass on some env vars to the script. Some useful props to pass:

• user qz space
• shared qz space
• qz version
• os/arch
• install location

I'm going to skip these for now, but they shouldn't be too bad to implement if needed.

[tresf]

I'm going to skip these for now, but they shouldn't be too bad to implement if needed.

I changed my mind and decided to add these in. Documented here: https://qz.io/docs/provisioning#script-variables