use ibmcloud commands instead of cf #24

Hello,
feedback from an external user.

the readme states to use cf commands,
whereas ibmcloud cli should be used.

A faster path to successful deployment could be:
1 - go to https://cloud.ibm.com/
2 - Create app
3 - BYOC

4 - paste the repos URL
5 -> create

Or add the Create toolchain button - more simple