Advanced SEO optimisations

[noway]

Is your feature request related to a problem? Please describe.
I'm always frustrated when our SEO is not ideal.

Describe the solution you'd like

• Implement JSON LD/structured data
• Implement Feature guides https://developers.google.com/search/docs/advanced/structured-data/special-announcements
• alt tags
• schema.org/sitemap
• make the whole website static/cacheable?
• suburb id instead of any location
• local SEO

Additional context
This is a lot of work, and each one of those tasks is probably a PR of it's own.