Add databse string example

[PandelisZ]

The DB url requires some extra parameters to work

- Summary

[POP] 2020/01/08 12:25:03 warn - IMPORTANT! 'parseTime=true' option is required to work properly. Please add it to the database URL in the config!
[POP] 2020/01/08 12:25:03 warn - IMPORTANT! 'multiStatements=true' option is required to work properly. Please add it to the database URL in the config!

Might as well describe this in the readme as it is a requirement to use the service.

- Test plan

Documentation only

- Description for the changelog

Added an example database URI

- A picture of a cute animal (not mandatory but encouraged)