[mod] Update go.mod and go.sum to use latest gommon

Merge pull request #39 from dyweb/httpclient/init-context

Init httpclient and dockerclient Fix #37 

- only a small part of docker is implemented, however for a full docker cli, need the cli package to be ready, also the UI is needed to test output of log etc.

[doc][log] Add notes for new demo app

- want to have universal dashboard (better first finish go your
cassandra ...)
- list components and things to improve