As discussed on parent task, we try to add a layer of indirection to the deployment of tilerator / kartotherian, to all us to add additional dependencies.
An experimental new repo contains the minimal set of files to use it as glue: https://gerrit.wikimedia.org/r/#/admin/projects/maps/kartotherian/package
When building this repo (./server.js build --deploy-repo --force) the compilation of mapnik node module fails (P6396). This is most probably due to some mistake I did in package.json, but no idea which one...