Added "published-config" field to configuration. It's a path to a published JSON file (after login) to give additional parameters to the client. Reached by GET /api/system/config Currently the field "osm-url" is used by the client to determine the URL of the OSM server for the background layer.

#!/usr/bin/env bash
exec 2>&1 ./cmd/gemma/gemma --config gemma.toml