Update build.yml

.github/workflows/build.yml

@@ -21,6 +21,20 @@ jobs:
             export "name=ghcr.io/${{ github.repository_owner }}/${{ github.event.repository.name }}:latest"
             echo "image=${name,,}" >> ${GITHUB_OUTPUT}
 
+        - name: Cache Composer
+          id: cache-composer-files
+          uses: actions/cache@v3
+          with:
+            path: composer-cache-files
+            key: composer-cache-${{ hashFiles('composer.lock') }}
+
+        - name: Inject Cache
+          uses: reproducible-containers/[email protected]
+          with:
+            cache-source: composer-cache-files
+            cache-target: /root/.composer
+            skip-extraction: ${{ steps.cache-composer-files.outputs.cache-hit }}
+
         - name: Generate image
           run: shopware-cli project docker build ${{ steps.image.outputs.image }} --generate-only