diff --git a/.gitea/workflows/docker.yml b/.gitea/workflows/docker.yml
index 99d26f6..8acb616 100644
--- a/.gitea/workflows/docker.yml
+++ b/.gitea/workflows/docker.yml
@@ -1,4 +1,5 @@
 name: docker
+
 on:
   push:
     branches: [main]
@@ -6,27 +7,25 @@ on:
 
 jobs:
   build-and-push:
-    runs-on: docker
-    container:
-      image: catthehacker/ubuntu:act-latest
+    # Läuft auf dem self-hosted Runner (Docker muss auf dem Host installiert sein).
+    runs-on: self-hosted
     steps:
       - name: Checkout
         uses: actions/checkout@v4
 
-      - name: Set up Docker Buildx
-        uses: https://github.com/docker/setup-buildx-action@v3
-
       - name: Log in to Gitea Container Registry
         run: echo "${{ secrets.REGISTRY_TOKEN }}" | docker login git.jfritzsche.de -u jf --password-stdin
 
-      - name: Build and push
-        uses: https://github.com/docker/build-push-action@v6
-        with:
-          context: .
-          push: true
-          tags: |
-            git.jfritzsche.de/jf/jf-homepage:latest
-            git.jfritzsche.de/jf/jf-homepage:${{ github.sha }}
+      - name: Build
+        run: |
+          docker build \
+            -t git.jfritzsche.de/jf/jf-homepage:latest \
+            -t git.jfritzsche.de/jf/jf-homepage:${{ github.sha }} .
+
+      - name: Push
+        run: |
+          docker push git.jfritzsche.de/jf/jf-homepage:latest
+          docker push git.jfritzsche.de/jf/jf-homepage:${{ github.sha }}
 
       - name: Logout
         run: docker logout git.jfritzsche.de