chore: import upstream snapshot with attribution

ci/docker/docgpu.build.Dockerfile

@@ -0,0 +1,25 @@
+# syntax=docker/dockerfile:1.3-labs
+
+ARG DOCKER_IMAGE_BASE_BUILD=cr.ray.io/rayproject/oss-ci-base_gpu-py3.10
+FROM $DOCKER_IMAGE_BASE_BUILD
+
+ARG PYTHON
+ARG PYTHON_DEPSET=python/deplocks/ci/docgpu_depset_py$PYTHON.lock
+
+SHELL ["/bin/bash", "-ice"]
+
+COPY . .
+
+COPY "$PYTHON_DEPSET" /home/ray/python_depset.lock
+
+RUN <<EOF
+#!/bin/bash
+
+set -euo pipefail
+
+uv pip install -r /home/ray/python_depset.lock --no-deps --system --index-strategy unsafe-best-match
+
+# Remove installed ray so the source overlay at /rayci/ is used at test time
+pip uninstall -y ray
+
+EOF