New method to return configuration from the pode.json file, plus improved docs

[Badgerati]

There is a pode.json config file that can be used - though only for static page defaults currently. This issue is to extend that, so that the config file can be used for custom things - like port numbers, hostnames, or other app settings the user so desires:

• A new Get-PodeConfiguration function to return the contents of the pode.json file (if it exists)
• The configuration is reloaded on an internal restart
• Improved documentation for the pode.json file
• Support for multi-environmental configs via a PODE_ENVIRONMENT env-var. So pode.dev.json if it's dev, or the default of pode.json for not set

[majkinetor]

Is this config stuff referenced by magic, some standard, function, little dwarfs or ... ?

What is the scope of this task ? Any custom data could be put there or just some you cherry picked as most important ?

[majkinetor]

Also, what about multiple enviromental configs ? Supporting stuff such as pode.[ENVIRONMENT.]json would be probably cool, where environment could be specified via env var.

[Badgerati]

At the moment it's loaded automatically when you start the server, and only looks for a pode.json at the root. There are key defined sections in there, for web/tcp/smtp/service (so the 4 server types) however, it's just basic JSON and loaded as such - so you can add anything else you want in there.

It's only accessible and used internally currently, so this issue is so that anyone can use it.

I hadn't actually thought of doing a pode.[ENV.]json, but I do like that so I'll add it as a task.