add minimal examples

[alexbovet]

Thank you very much for this great project.

It seems to be a really well made way of collecting data that also supports efficient search.

I really would like to use it and I was thinking that a few minimal examples showing how to collect data, add a list of channels, query the database, etc. would be very helpful.

Also, is it possible to load the zenodo dataset (https://zenodo.org/record/3607497) into the PostgreSQL database?

Thanks,

Alex