backend requirements

[wibrt]

Hello,

this only working in suisse at the moment?,

what are your practical requirements for the backend db,

• for example is 1 server enough?
• how many users are there?
  to get an estimate about the needed requirements depending the number of users.

keep up the good work

[ineiti]

Note to self: add comments to README to indicate what needs to be changed - country codes, private keys, ...