Override by making a copy of the file under `custom/templates/mail` using a
full path structure matching source.
Any statement contained inside `{{` and `}}` are Gitea's template
syntax and shouldn't be touched without fully understanding these components.
## Adding Analytics to Gitea
Google Analytics, Matomo (previously Piwik), and other analytics services can be added to Gitea. To add the tracking code, refer to the `Other additions to the page` section of this document, and add the JavaScript to the `custom/templates/custom/header.tmpl` file.