🛠️ Ansible usage docs for installing Hutch should be clearer

[beforan]

Summary

Currently the documentation for installing, preparing and running Ansible Playbooks to install Hutch and it's direct dependencies isn't as clear as it could be.

The following enhancements are desirable:

• Clarity around Ansible installation - link directly to installation documentation instead of the main Ansible homepage.
• Clarity around what is required in terms of modifying the Hutch Service Description.
  • The docs currently mention configuration is needed, but are unclear (Note this may change anyway due to 🛠️ Make Hutch configuration guidance for installation clearer #12 )
  • There may be gotchas when preparing the Service Description file: "you need to give the full path to the executable. Turns out it's not relative to the working directory"

Tasks

• Update link to Ansible installation docs
• Clarify Service Description documentation

Acceptance Criteria

• The Hutch documentation links directly to Ansible installation documentation
• The Hutch documentation describes accurately what needs specifying in the Service Description file