Build and Push Docker images to Google Artifact Registry (GAR)

Merge pull request #115 from broadinstitute/sn_POD-2230_update_wdl_do… #129

# to view logs

Summary
Jobs
- build
Run details
- Usage
- Workflow file

Run time

Learn about OS # on GitHub Actions

Job	Run time
build	2m 15s
	2m 15s