feat: Add workflow for building dashboard image

Creates a new GitHub Actions workflow to build and push the dashboard
Docker image on pushes to the main branch. Adds Dockerfile for the
dashboard to define the build process.

Benefits include automated builds and consistent deployment of the
dashboard container.

.github/workflows/push-dashboard-image.yml

@@ -0,0 +1,47 @@
+name: Build dashboard containers
+
+env:
+  DOCKER_REGISTRY: nethermind.jfrog.io
+  REPO: nubia-docker-local-prod
+  IMAGE_NAME: p2p-dashboard
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - 'dashboard/**'
+      - '.github/workflows/push-dashboard-image.yml'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  Build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@v4
+
+      - name: Define image tag
+        run: |
+          TAG=$(git describe --tags --always)
+          echo "DOCKER_IMAGE_TAG=$TAG" >> $GITHUB_ENV
+
+      - name: Setup Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to registry
+        run: |
+          docker login ${{ env.DOCKER_REGISTRY }} -u ${{ secrets.ARTIFACTORY_NUBIA_USERNAME }} -p ${{ secrets.ARTIFACTORY_NUBIA_TOKEN_DEVELOPER}}
+
+      - name: Build backend image
+        uses: docker/build-push-action@v6
+        with:
+          context: ./dashboard
+          file: ./dashboard/backend.Dockerfile
+          platforms: "linux/amd64"
+          tags: |
+            ${{ env.DOCKER_REGISTRY }}/${{ env.REPO }}/${{ env.IMAGE_NAME }}:${{ env.DOCKER_IMAGE_TAG }}
+            ${{ env.DOCKER_REGISTRY }}/${{ env.REPO }}/${{ env.IMAGE_NAME }}:latest

dashboard/Dockerfile

@@ -0,0 +1,9 @@
+FROM node:23-slim
+
+WORKDIR /app
+
+COPY . .
+
+RUN npm install && npm run build
+
+ENTRYPOINT ["npm", "run", "server"]