[Website]: Add sitemap generator to website

[ssandino]

Is there an existing request for this feature?

• I have searched the existing issues

Is your feature request related to a problem? Please describe.

A majority of our pages are not indexed by Google, most likely due to not having a self-updating sitemap.

Source: Google Search Console

Describe the solution/feature

This issue was raised earlier, where we had to use an addon for Next.js that still had a bug, if I remember correctly @mkue. Meanwhile, the Next.js App Router seems to have built-in support for generating sitemaps (Documentation).

Describe alternatives you've considered

No response

Criteria for Completion

No response

Anything else?

No response

Code of Conduct

• I've read the Code of Conduct and understand my responsibilities as a member of the Social Income community