Remove newlines from file where webhook secret is stored

[martindekov]

We need to check if newlines are present in the file where we load our docker secrets from.Some editors may add extra newline at the end making the secret invalid.

Signed-off-by: Martin Dekov (VMware) mdekov@vmware.com

Adding check to see if newlines are present in the file from which we create docker secret for derek-secret-key.

Description

Add check in main.go if newline is present in the secret string loaded from the file and if so it removes it.

Motivation and Context

• [ ] I have raised an issue to propose this change (required)

It solves issue #72.

How Has This Been Tested?

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [x] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [x] I've read the CONTRIBUTION guide
• [x] I have signed-off my commits with git commit -s
• [ ] I have added tests to cover my changes.
• [x] All new and existing tests passed.

[alexellis]

Awesome job!