cannot set up Kallithea in Ubuntu 16.04

[Uwe Brauer]

Hi 

I managed to install kallithea using pip.
However the last step in the setup, namely 
sudo kallithea-cli front-end-build

Failed:

,----
| Running 'npm install' to install front-end dependencies from package.json
| Building CSS styling based on Bootstrap
| /usr/bin/env: ‘node’: No such file or directory
| Traceback (most recent call last):
|   File "/usr/local/bin/kallithea-cli", line 10, in <module>
|     sys.exit(cli())
|   File "/usr/local/lib/python2.7/dist-packages/click/core.py", line 764, in __call__
|     return self.main(*args, **kwargs)
|   File "/usr/local/lib/python2.7/dist-packages/click/core.py", line 717, in main
|     rv = self.invoke(ctx)
|   File "/usr/local/lib/python2.7/dist-packages/click/core.py", line 1137, in invoke
|     return _process_result(sub_ctx.command.invoke(sub_ctx))
|   File "/usr/local/lib/python2.7/dist-packages/click/core.py", line 956, in invoke
|     return ctx.invoke(self.callback, **ctx.params)
|   File "/usr/local/lib/python2.7/dist-packages/click/core.py", line 555, in invoke
|     return callback(*args, **kwargs)
|   File "/usr/local/lib/python2.7/dist-packages/kallithea/bin/kallithea_cli_front_end.py", line 64, in front_end_build
|     cwd=front_end_dir, shell=kallithea.is_windows)
|   File "/usr/lib/python2.7/subprocess.py", line 541, in check_call
|     raise CalledProcessError(retcode, cmd)
| 
| subprocess.CalledProcessError: Command
| '['/usr/local/lib/python2.7/dist-packages/kallithea/front-end/node_modules/.bin/lessc',
| '--source-map', '--source-map-less-inline',
| '/usr/local/lib/python2.7/dist-packages/kallithea/front-end/main.less',
| '/usr/local/lib/python2.7/dist-packages/kallithea/public/css/style.css']'
| returned non-zero exit status 127
| 
| 
`----

What can I do?

Regards

Uwe Brauer