Try

.gitea/workflows/build-push.yml

@@ -0,0 +1,37 @@
+name: 'Build and Push Image'
+
+on:
+  workflow_call:
+    inputs:
+      context:
+        description: 'The Docker build context'
+        required: true
+      tags:
+        description: 'The Docker image tags'
+        required: true
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    container:
+      image: catthehacker/ubuntu:act-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v4
+
+    - name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v3
+
+    - name: Login to Docker Registry
+      uses: docker/login-action@v3
+      with:
+        registry: git.kjan.de
+        username: ${{ secrets.REGISTRY_USERNAME }}
+        password: ${{ secrets.REGISTRY_TOKEN }}
+
+    - name: Build and push
+      uses: docker/build-push-action@v5
+      with:
+        context: ${{ inputs.context }}
+        push: true
+        tags: ${{ inputs.tags }}
+

.gitea/workflows/node-ssh.yaml

@@ -9,7 +9,7 @@ jobs:
 
     steps:
     - name: Build and Push Image
-      uses: actions/runner-images/.gitea/actions/build-push.yml@main
+      uses: actions/runner-images/.gitea/workflows/build-push.yml@main
       with:
         context: ./images/actions/node-ssh
         tags: |