Run integration tests on GitHub Actions

[StoneDot]

Currently, we don't execute CI/CD tests on GitHub actions. This issue track blockers of CI/CD on GitHub actions.

The current main blocker are followings:

• Provide a environment variable to specify endpoint URL #58
• There is no way to pass arbitrary endpoint name to dynein. #57
• There is no mechanism to stop container launch on testing. #56

Additional related enhancements are followings:

• Add options to wait for the availability of DynamoDB's endpoint to stabilize integration tests #75

Before we tackle this issue, we should resolve the above blockers.

[StoneDot]

This issue was resolved by #133. We can now consider other related issues separately.