fix: provision Node runtime in server image

DouYinSparkFlow/.dockerignore

@@ -0,0 +1,12 @@
+__pycache__/
+*.py[cod]
+.pytest_cache/
+.ruff_cache/
+.git/
+.github/
+tests/
+logs/
+config.json
+usersData.json
+webui_settings.json
+*.log

DouYinSparkFlow/Dockerfile.server

@@ -1,6 +1,10 @@
 ARG PLAYWRIGHT_BASE_IMAGE=mcr.microsoft.com/playwright/python:v1.56.0-jammy
+ARG NODE_RUNTIME_IMAGE=node:22-bookworm-slim
+FROM ${NODE_RUNTIME_IMAGE} AS node-runtime
 FROM ${PLAYWRIGHT_BASE_IMAGE}
 
+COPY --from=node-runtime /usr/local/bin/node /usr/local/bin/node
+
 WORKDIR /app
 
 ARG HTTP_PROXY

DouYinSparkFlow/tests/test_deployment_contract.py

@@ -88,11 +88,18 @@ class DeploymentContractTests(unittest.TestCase):
     def test_playwright_base_image_argument_is_used(self):
         dockerfile = (SOURCE_ROOT / "Dockerfile.server").read_text(encoding="utf-8")
         self.assertTrue(dockerfile.startswith("ARG PLAYWRIGHT_BASE_IMAGE="))
+        self.assertIn("FROM ${NODE_RUNTIME_IMAGE} AS node-runtime", dockerfile)
         self.assertIn("FROM ${PLAYWRIGHT_BASE_IMAGE}", dockerfile)
+        self.assertIn("COPY --from=node-runtime /usr/local/bin/node", dockerfile)
         self.assertIn("docker.io", dockerfile)
         self.assertIn("node --version", dockerfile)
         self.assertNotIn("github.com/docker/compose", dockerfile)
 
+    def test_docker_build_context_excludes_runtime_data(self):
+        dockerignore = (SOURCE_ROOT / ".dockerignore").read_text(encoding="utf-8")
+        for entry in ("logs/", "config.json", "usersData.json", "webui_settings.json"):
+            self.assertIn(entry, dockerignore)
+
     def test_legacy_unused_entrypoints_are_removed(self):
         self.assertFalse((SOURCE_ROOT / "webui" / "login_sessions.py").exists())
         self.assertFalse((SOURCE_ROOT / "relogin_worker.py").exists())