Add GitHub Actions workflow to build and push docker image to GHCR

Author: AdrianDsg

.github/workflows/deploy_to_ghcr.yml

@@ -0,0 +1,35 @@
+name: Build and push Docker image
+
+on:
+  push:
+    branches:
+      - main
+  # pull_request:
+  #   types: [opened, synchronize, reopened, closed]
+  #   branches:
+  #     - main
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+permissions:
+  packages: write
+
+jobs:
+  push_to_ghcr:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout GitHub Action
+        uses: actions/checkout@v4
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and Push Docker Image
+        run: |
+          docker build. --tag ghcr.io/${{ github.repository }}/copilot-metrics-viewer:latest
+          docker push ghcr.io/${{ github.repository }}/copilot-metrics-viewer:latest