install webgpu from github not pip (testing not yet published)

Author: ChrLackner

tests/Dockerfile

@@ -1,7 +1,7 @@
 ARG BASE_IMAGE=webgpu-base
 FROM ${BASE_IMAGE}
 
-RUN pip install --no-cache-dir --break-system-packages ngsolve ipython webgpu
+RUN pip install --no-cache-dir --break-system-packages ngsolve ipython git+https://github.com/CERBSim/webgpu.git
 
 WORKDIR /app
 COPY pyproject.toml .