Feature request - randomised ids

[yeleleo]

Hi there,

Love your project, just one feature request if possible - can you optionally make config line where we will be able to configure random id with the conversion it to base62 (so basically random and not starting from id=1, but already from id=100,000,000)

The main reason is to make same-looking final url with 4-5 symbols and random order as:
/yuwUi
/ijjeJ
/JhjdI