update dockerfile to also install git lfs

Author: ChrLackner

docs/testing.rst

@@ -236,7 +236,7 @@ now available in your tests.
 
 Derive from the ``webgpu-base`` image so you get Chrome, lavapipe and
 Python test dependencies for free.  Install ``webgpu`` (which includes
-``webgpu.testing``) from PyPI or from a local checkout:
+``webgpu.testing``) from PyPI:
 
 .. code-block:: dockerfile
 

tests/Dockerfile.base

@@ -3,6 +3,8 @@ FROM mcr.microsoft.com/playwright/python:v1.58.0-noble
 # Install lavapipe (software Vulkan) for WebGPU support
 RUN apt-get update && apt-get install -y --no-install-recommends \
     mesa-vulkan-drivers \
+    git-lfs \
+    && git lfs install \
     && rm -rf /var/lib/apt/lists/*
 
 ENV VK_ICD_FILENAMES=/usr/share/vulkan/icd.d/lvp_icd.json