Fix docker publish work

.gitea/workflows/docker-publish.yaml

@@ -12,10 +12,12 @@ jobs:
     permissions:
       contents: read
       packages: write
+    env:
+      RUNNER_TOOL_CACHE: /toolcache
 
     steps:
-      - name: Checkout code
-        uses: actions/checkout@v2
+      - name: Check out repository code
+        uses: actions/checkout@v4
 
       - name: Get version
         id: get_version
@@ -25,12 +27,19 @@ jobs:
         uses: docker/setup-buildx-action@v1
 
       - name: Login to Docker Hub
-        uses: docker/login-action@v1
+        uses: docker/login-action@v3
         with:
-            registry: ghcr.io
-            username: ${{ github.actor }}
-            password: ${{ secrets.GITHUB_TOKEN }}
+          registry: git.matthiasg.dev
+          username: ninluc
+          password: ${{ secrets.REGISTRY_TOKEN }}
 
+      - name: Cache Docker layers (registry-backed)
+        uses: actions/cache@v4
+        with:
+          path: /tmp/.buildx-cache
+          key: buildx-cache-${{ github.sha }}
+          restore-keys: |
+            buildx-cache-
 
       - name: Build and push
         uses: docker/build-push-action@v2