add http request status code error checking

[datwiz]

Added checks for http requests to log and exit when an http return code other than "200" is returned.

Had an issue getting the job to work and added the return code checks to help debug the issue.
Turns out the error was due to an embedded line feed char in a secret, but the error checking helped to diagnose the issue.

[frankreno]

fixed by #5

[frankreno]

changes are now available in docker tag 0.0.3/latest