perf(ci): accelerate native Docker dependencies

tests/test_fnos_dependency_script.py

@@ -19,3 +19,13 @@ def test_native_amd64_pipeline_does_not_boot_buildx() -> None:
     assert 'test "$(uname -m)" = x86_64' in pipeline
     assert "DOCKER_BUILDKIT=0 ./scripts/ci-docker.sh build" in pipeline
     assert "buildx" not in pipeline
+    assert "--no-cache" not in pipeline
+
+
+def test_docker_build_uses_domestic_dependency_mirrors() -> None:
+    dockerfile = (Path(__file__).parents[1] / "Dockerfile").read_text()
+    assert "docker.m.daocloud.io/library/node" in dockerfile
+    assert "docker.m.daocloud.io/library/python" in dockerfile
+    assert "mirrors.tuna.tsinghua.edu.cn/debian" in dockerfile
+    assert "registry.npmmirror.com" in dockerfile
+    assert '--index-url "$PIP_INDEX_URL"' in dockerfile