Feature: Order services

I implemented the backend for ordering a service.

Diagram explaining flow
Text scored with red has not been implemented yet

It works by

1. Storing the service and configuration in a database
2. Sending a request to the virtual server to run the service (signing the message so the virtual server can trust it)

This setup is pretty complicated but it allows for virtual servers to run virtually anything and have configuration options for all of it.

I have yet to implement:

1. Per addon pricing (e.g +1 credit for +1 GB RAM)
2. Configuration groups, which would allow for sections of configuration (e.g simple, advanced, and addons)
3. Advanced options (required, selects etc)
4. A proper virtual server that actually runs stuff
5. A good service page

1. Implement service orders
2. Disable spinners on number inputs