Update context for dockerfile build

[sshrihar]

Pull Request Template

Description

For reusable github workflow the dockerfile context needs to be changed to the containing directory. This update fixes the issue when dockerfile may be contained in a sub-app and the context is required to be changed.

Fixes # (issue)

Type of change

Please delete options that are not relevant.

• 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 not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration.

• Test A
• Test B

Checklist:

Before you submit your pull request, please make sure you have completed the following:

• I have followed the contributing guidelines.
• My code follows the style guidelines of this project and I have run lint to ensure the code style is valid
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

Screenshots (if appropriate):

Include any screenshots that will help explain your changes.

Additional context

Add any other context about the pull request here.