Powershell Universal installer flag to keep appsettings.json, skip service restart

To automate deployment and upgrades, it would be really helpful for the Powershell Universal installer to have flags to keep appsettings.json file, and/or control automatic service start after install.

Product: PowerShell Universal
Version: 1.4.6

We are working on rebuilding our installer for v3 to address a lot of issues we have with post-install configuration. You can keep your appsettings.json file by installing it to the ProgramData folder.