Issue #SBCOSS-00: Create Github actions to publish docker image to GHCR

[chethann007]

This PR adds a GitHub Actions workflow to the cert-service repository.

Build and Deploy (build.yml):
Triggers when a Git tag is pushed.
Builds the project, packages the artifact, builds a Docker image, and pushes it to GitHub Container Registry (GHCR).

Description by Korbit AI

What change is being made?

Create a GitHub Actions workflow to automate the build and deployment of a Docker image to the GitHub Container Registry (GHCR) upon tagging a commit.

Why are these changes being made?

Automating the Docker image publishing process enhances the continuous integration and continuous deployment (CI/CD) flow, ensuring that tagged releases are promptly and consistently packaged and available in the container registry. This approach improves deployment efficiency and reduces the potential for human error during the release process.

Is this description stale? Ask me to generate a new description by commenting /korbit-generate-pr-description

[korbit-ai]

I've completed my review and didn't find any issues... but I did find this squirrel.

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[Copilot]

Pull Request Overview

This PR creates a GitHub Actions workflow to automate the building and deployment of Docker images to the GitHub Container Registry (GHCR) when Git tags are pushed.

• Implements automated CI/CD pipeline triggered by tag pushes
• Builds Maven project and packages Play framework distribution
• Builds and publishes Docker images to GHCR with tagged versioning

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