only build image if changes are detected. This should stop building both images no matter where changes were made

.github/workflows/docker-publish.yml

@@ -12,31 +12,66 @@ on:
       - 'whmcs-nginx/**'
 
 jobs:
+  changes:
+    name: Detect changed paths
+    runs-on: ubuntu-latest
+    outputs:
+      php: ${{ steps.filter.outputs.php }}
+      nginx: ${{ steps.filter.outputs.nginx }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Paths filter
+        id: filter
+        uses: dorny/paths-filter@v3
+        with:
+          filters: |
+            php:
+              - 'whmcs-php-fpm/**'
+            nginx:
+              - 'whmcs-nginx/**'
+
   build-and-push:
+    name: Build & Push (${{ matrix.name }})
+    needs: changes
     runs-on: ubuntu-latest
     permissions:
       contents: read
-      packages: write
-
+      packages: write   # required for ghcr
+    # Run each matrix ONLY if its folder changed
+    if: |
+      (matrix.changed_output == 'php' && needs.changes.outputs.php == 'true') ||
+      (matrix.changed_output == 'nginx' && needs.changes.outputs.nginx == 'true')
     strategy:
       matrix:
         include:
           - name: whmcs-php-fpm
             context: whmcs-php-fpm/
+            tag: ghcr.io/edythecow/whmcs-php-fpm:latest
+            changed_output: php
           - name: whmcs-nginx
             context: whmcs-nginx/
+            tag: ghcr.io/edythecow/whmcs-nginx:latest
+            changed_output: nginx
 
     steps:
-      - uses: actions/checkout@v4
-      - uses: docker/setup-buildx-action@v3
-      - uses: docker/login-action@v3
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to GHCR
+        uses: docker/login-action@v3
         with:
           registry: ghcr.io
           username: ${{ github.repository_owner }}
           password: ${{ secrets.GITHUB_TOKEN }}
+
       - name: Build & push ${{ matrix.name }}
         uses: docker/build-push-action@v6
         with:
           context: ${{ matrix.context }}
           push: true
-          tags: ghcr.io/edythecow/${{ matrix.name }}:latest
+          tags: ${{ matrix.tag }}