Separated staging and latest Docker image build workflows

.github/workflows/docker-image-staging.yml

@@ -0,0 +1,42 @@
+name: Catapult staging Docker image builder
+
+on:
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Pulling Catapult repository...
+        uses: actions/checkout@v4
+
+      - name: Preparing image build...
+        run: make customizations
+
+      - name: Logging into to GitHub Container Registry...
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Installing QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Building Catapult image...
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          platforms: linux/amd64,linux/arm64
+          file: ./Dockerfile
+          push: true
+          tags: |
+            ghcr.io/clarifiedsecurity/catapult:staging