Kelp GUI: --dev mode should spin up ccxt (otherwise autogenerated bot fails quickly with exit code 2)

[nikhilsaraf]

this is making it hard to develop on Kelp GUI in dev mode

log error:

unable to connect to ccxt at the URL http://localhost:3000: could not execute http request: Get http://localhost:3000: dial tcp [::1]:3000: connect: connection refused

I recently added a commit that logs this in the log file of the bot, before this log line it was very hard to debug why the bot would stop with exit status 2 automatically

• [ ] start ccxt in dev mode
• [ ] the GUI should give a better error message when CCXT is disabled