Your ROOT_URL in app.ini is https://git.cloudchain.link/ but you are visiting https://dash.bss.nz/open-source-mirrors/overseerr/blame/commit/432ad76b3bb56a7cd34d7c159773fd447ccbc14f/README.md
You should set ROOT_URL correctly, otherwise the web may not work correctly.
You can develop Overseer entirely in docker. Make sure you have [Docker Desktop](https://www.docker.com/products/docker-desktop) installed before continuing.