diff --git a/.gitea/workflows/ci.yml b/.gitea/workflows/ci.yml
index 8270131..f13b919 100644
--- a/.gitea/workflows/ci.yml
+++ b/.gitea/workflows/ci.yml
@@ -13,7 +13,7 @@ env:
 
 jobs:
   test:
-    runs-on: ubuntu-latest
+    runs-on: gitea
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -33,7 +33,7 @@ jobs:
         run: uv run pytest
 
   docker-push:
-    runs-on: ubuntu-latest
+    runs-on: gitea
     needs: test
     if: gitea.event_name == 'push'
     steps:
@@ -50,11 +50,8 @@ jobs:
         uses: docker/login-action@v3
         with:
           registry: ${{ env.REGISTRY }}
-          username: ${{ secrets.DOCKER_REGISTRY_USER }}
-          password: ${{ secrets.DOCKER_REGISTRY_TOKEN }}
-
-      - name: Extract commit SHA
-        run: echo "SHA=${GITEA_SHA:0:7}" >> $GITHUB_ENV
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
 
       - name: Build and push multi-arch image
         uses: docker/build-push-action@v6
@@ -63,7 +60,7 @@ jobs:
           push: true
           platforms: linux/amd64,linux/arm64
           tags: |
-            ${{ env.IMAGE_NAME }}:${{ env.SHA }}
+            ${{ env.IMAGE_NAME }}:${{ gitea.sha }}
             ${{ env.IMAGE_NAME }}:latest
           cache-from: type=registry,ref=${{ env.IMAGE_NAME }}:latest
           cache-to: type=registry,ref=${{ env.IMAGE_NAME }}:latest,mode=max