Add how-to guide for using Netlify template

[ably-sync-bot]

Create a how-to guide based on Jo’s instructions for using the template.

This will initially be surfaced in the docs under “tutorials”, but we might want to think about having a separate section for housing how-to content. (How-to content differs from tutorial content in that it contains just the steps for achieving a task, but doesn’t contain instructions for building a complete project. The differences between how-to and tutorial content are defined here.) [~accountid:61e15be049f1950069c45c0f] Please confirm this approach is OK.

┆Issue is synchronized with this Jira Task by Unito

[ably-sync-bot]

➤ Phil Leggetter commented:

Mark Lewin confirmed 👍

[ably-sync-bot]

➤ Mark Lewin commented:

Jo Franchetti To provide new, better quality, images - so marking as ON HOLD for now.

[ably-sync-bot]

➤ Mark Lewin commented:

Draft PR: #1573 ( https://github.com/ably/docs/pull/1573|smart-link )