Subdomain based app URL support

Description

Added support for Namespace sub domain based app URL Changed Web action URL to use new pattern supported by runtime

Related Issue

Motivation and Context

Adobe I/O Runtime now supports namespace based subdomain. App URL which was previously s3 based can now use this. All web action also follow the same pattern and need to be updated the way they are accessed

How Has This Been Tested?

Manual test deploying the branch.

Screenshots (if appropriate):

Types of changes

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

Checklist:

[x ] I have signed the Adobe Open Source CLA.
[x ] My code follows the code style of this project.
[x ] My change requires a change to the documentation.
[x ] I have updated the documentation accordingly.
[ ] I have read the CONTRIBUTING document.
[ ] I have added tests to cover my changes.
[x ] All new and existing tests passed.

adobe / adobeio-cna-starter-project

Subdomain based app URL support #27