Thank you very much Edouard for explanation. Sri about having mixed things up.
Now I have a server-process running:
jhj 23420 0.6 8.7 620348 85152 pts/0 Sl+ 14:26 0:02 /opt/install/sdrangel/bin/sdrangelsrv -a 172.17.0.2
And I will go on with the sdrangelcli process and maybe the compose tools.
73 OZ1OY, Jan