Customized api

[AndyJenness]

Checklist

• I've read and followed the Contribution Guidelines
• step.yml and README.md is updated with the changes (if needed)

Version

Requires a MINOR version update
Unsure, either Minor or Patch. It adds some new functionality but is backwards compatabile.

Context

Appetize.io allows for custom api endpoints, e.g. @YourBusinessName.appetize.io/v1/apps. This patch allows for the endpoint and app host name to be customized but defaults to appetize.io to not effect current users of this step.

Changes

• Added appetize_api, default = @api.appetize.io/v1/apps, to bitrise.yml options with descriptions & defaults
• Added appetize_host, default = appetize.io, to bitrise.yml options with descriptions & defaults
• Removed theapiEndPoint constant in client.go
• Added apiEndPoint as a variable to be passed to NewClient & baseURL in client.go
• Added host as a variable to be passed to generateAppURL in main.go
• Updated tests with new variables

Testing

I tested in my bitrise setup using the git url for this fork and was successful for both use cases of defaults and setting new parameters.

Investigation details

Decisions

[AndyJenness]

@ofalvai , hi there, I'm trying to get this PR reviewed but it doesn't look like I can assign a reviewer. Would you be able to assist? Thank you!

[AndyJenness]

@BirmacherAkos , I see that you've reviewed for this repo before, do you mind taking a look at this PR?

[vshah23]

Hi @AndyJenness we appreciate your contribution to improving this step!

[vshah23]

Please run gofmt in the project directory.

[AndyJenness]

@vshah23 Thanks for reviewing! Sorry, I missed your comment for so long. I've run gofmt and updated the files.