Fix Docker Hub image workflow

.github/workflows/docker-build-push.yml

@@ -3,6 +3,10 @@ name: Docker Image Build and Push
 on:
   push:
     branches: [ main ]
+  workflow_dispatch:
+
+env:
+  IMAGE_NAME: ecs-controller
 
 jobs:
   build-and-push:
@@ -23,18 +27,11 @@ jobs:
         username: ${{ secrets.DOCKER_USERNAME }}
         password: ${{ secrets.DOCKER_PASSWORD }}
 
-    - name: Build and Push Docker image (amd64)
+    - name: Build and Push Docker image
       uses: docker/build-push-action@v5
       with:
         context: ./
-        platforms: linux/amd64
+        platforms: linux/amd64,linux/arm64
         push: true
-        tags: ${{ secrets.DOCKER_USERNAME }}/cdt-monitor:latest
-
-    - name: Build and Push Docker image (arm64)
-      uses: docker/build-push-action@v5
-      with:
-        context: ./
-        platforms: linux/arm64
-        push: true
-        tags: ${{ secrets.DOCKER_USERNAME }}/cdt-monitor:arm
+        tags: |
+          ${{ secrets.DOCKER_USERNAME }}/${{ env.IMAGE_NAME }}:latest