To test preview,
`./contrib/teamcity/build-configurations.py preview-chronik.e.cash`
To test prod,
create `.abclatestversion` in `docs/chronik.e.cash` with contents `0.29.2`
Edit line 25 of `modules/Dockerfile` to read `ARG NGINX_CONF=nginx-preview.conf`, then
```
docker build -t chronik-docs_local .
docker run --rm -p 8080:80 --name chronik-docs chronik-docs_local
```
site is available at localhost:8080, links are not broken (the build will fail if there are broken links), and download & install links use 0.29.2