| NC_TOOL_DIR | No | App directory to keep metadata and app related files | Defaults to current working directory. In docker maps to `/usr/app/data/` for mounting volume. | |
| NC_TOOL_DIR | No | App directory to keep metadata and app related files | Defaults to current working directory. In docker maps to `/usr/app/data/` for mounting volume. | |
| NC_PUBLIC_URL | Yes | Used for sending Email invitations | Best guess from http request params | |
| NC_PUBLIC_URL | Yes | Used for sending Email invitations | Best guess from http request params | |