- keeping both: mermaid + images

- since github is not supporting mermaid for their markdown rendering

* glow is kinda distracting
* original test for title content prevents utilizing a change of
this characteristic form being used for demonstration purposed. The
additional test makes testing for the title more flexible and not
relying on its content

* adjust app readme
* revert change in server 'scripts'
* renamed 'stack' into 'hack' and split up Makefile into two to better separate
  devops scenarios from scoped deps management
* updated readme according to the make target changes

* fix file name typo
* remove logs in test do reduce noise
* prevent 'connection established' log in test mode to reduce noise
* rename test to make it more obvious that it does not require (or create)
  a user object

Added DB-Test