Onionspray "create" command for quick setup

Description

Onionspray lacks a command for quickly creating an onionsite with usual defaults.

This depends on the vanity address generation being implemented, and that Onionmine is available as a vendorized dependency.

Syntax and usage example usage:

./onionspray create <project> <domain> [vanity]
./onionspray create example example.org example

This creates a new a project called example, with an onionsite proxy to example.org using a generated address like examplehrgu32msadjtfcko3lckz44ae2m6ymzldg5kxfgdbawmwqxid.onion.

Tasks

• Make a template for this command.
• Implement a create command, like ./onionspray create <project> <domain> [vanity] that:
  • Create the project from the template.
  • Create the vanity address (if passed as an argument).
  • Create a TLS private key and self-signed certificate.
  • Create a Certificate Request (CSR) with the generated TLS, ready for the case of getting a CA-validated HTTPS certificate. Then, if the Operator decides to purchase a certificate, only the resulting cert PEM bundle needs to be installed, everything else being set.
• Update the documentation:
  • Tutorial.
  • Demonstration.
  • Using Onionspray.
  • Command syntax.
  • Upcoming general HTTPS docs (since this command generates the self-signed cert and other needed files for TLS/HTTPS).

Time estimation

• Complexity: small (1 day)
• Uncertainty: low (x1.1)
• Reference (adapted)

cc: @gus