init config error handling

[ronenkapelian]

long story - short story :
scenario: making config initialization with offlinemode=false, so it tries to connect to the config server.

expected results:
it will be connected to the server if it is successful, if failed, it will return east to understand the error message.

actual:-
on success - it's greater :-)

on some errors:
If the server does not exist: "ConfigError [httpGeneralError]: An error occurred while making the request" good response.

if the server does not exist and the page it reached is not JSON - got an error from undici about bad parsing