Create step-by-step-docker-swarm-in-proxmox-guide

[adriankylam]

Creating a beginners guide to deloying the premix playbook.

WIP - there may be some errors

• Assumes users are using Proxmox host(s) and node(s)
• Covers some basic topics such as generating SSH keys
• Needs a review - some tasks could probably be performed more efficiently
• Assumes that users have correctly created and configured all required playbook files (e.g. main.yml)
• Note: the playbook can build the VMs without the Terraform proxmox provider manually installed - is it installed automatically?

Description

Motivation and Context

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• I have read the contribution guide
• The format of my changes matches that of other recipes (ideally it was copied from template)
• My changes have passed markdown linting, either by running ./scripts/local-markdownlint.sh locally, or by checking the status of the PR check below.

• I've added at least one footnote to my recipe (Chef's Notes)
• I've updated common-links.md in the _snippets directory and sorted alphabetically
• I've updated the navigation in mkdocs.yaml in alphabetical order
• I've updated CHANGELOG.md in reverse chronological order order
• I'm using the oldest-possible version of Docker-compose syntax for the feature my recipe needs (v3.2 unless there's a specific need for a later version)
• If traefik integration is required, I've included both v1 and v2 labels (see template)
• If a recipe-specific overlay network is required, I've used a unique subnet and recorded it in networks.md
• I've considered updating .github/CODEOWNERS so that I'll be automatically included as a reviewer on future changes to this recipe