(#14) - Add a pipeline to build and push the docker image

.github/workflows/deploy_docker_image.yml

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+# This workflow uses actions that are not certified by GitHub.
+# They are provided by a third-party and are governed by
+# separate terms of service, privacy policy, and support
+# documentation.
+
+# GitHub recommends pinning actions to a commit SHA.
+# To get a newer version, you will need to update the SHA.
+# You can also reference a tag or branch, but the action may change without warning.
+
+name: Deploy Docker Image
+
+# Controls when the action will run.
+on:
+
+  # Manual trigger
+  workflow_dispatch:
+
+  # Trigger the deployment on push to the main branch
+  push:
+
+    # Only the main branch
+    branches: [ "main" ]
+
+#    # Only when the Dockerfile changes
+#    tags:
+#      - '*'
+
+# The jobs that run in the workflow
+jobs:
+
+  # Build and push the Docker image
+  push_to_registry:
+    name: Build and push Docker image to Docker Hub
+    runs-on: ubuntu-latest
+    steps:
+
+      - name: Check out the repo
+        uses: actions/checkout@v4
+
+      - name: Build and push Docker image
+        uses: mr-smithers-excellent/[email protected]
+        with:
+          image: braboj/randomgen
+          registry: docker.io
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+          addLatest: true
+          pushImage: true