Pathogen characterisation - Added guidelines on metadata - #16

HttpError: Not Found - https://docs.github.com/rest/pages/pages#get-a-apiname-pages-site

Get Pages site failed. Please verify that the repository has Pages enabled and configured to build using GitHub Actions, or consider exploring the `enablement` parameter for this action. Error: Not Found - https://docs.github.com/rest/pages/pages#get-a-apiname-pages-site

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