Configure instructions for this repository as documented in Best practices for Copilot coding agent in your repository

Include path specific instructions for src/content/post that contains the style guide instructions for writing blog posts and where they and associated images should live (yyyy/mm directories etc). Examine a large selection of the older blog posts to determine any specific instructions useful to explain my writing style such as use of UK english, how I punctuate, the informal personal tone, lack of marketing hype etc.

For build instructions, prefer npm (i.e npm install, npm run dev).