fix: use linux_x64 host runner for Docker access

.gitea/workflows/release.yml

@@ -10,11 +10,28 @@ env:
   IMAGE_NAME: bill/grist-mcp
 
 jobs:
-  build:
+  test:
-    runs-on: ubuntu-latest
+    runs-on: linux_x64
     steps:
       - uses: actions/checkout@v4
 
+      - name: Run tests
+        run: echo "Tests would run here"
+
+  build:
+    needs: test
+    runs-on: linux_x64
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Debug environment
+        run: |
+          echo "PATH: $PATH"
+          echo "Which docker: $(which docker || echo 'not found')"
+          echo "Docker version: $(docker --version || echo 'docker not available')"
+          ls -la /usr/bin/docker || echo "/usr/bin/docker not found"
+          ls -la /var/run/docker.sock || echo "docker.sock not found"
+
       - name: Extract version from tag
         id: version
         run: |