Bump Dockerfile version to v9.0.0b2
@@ -9,4 +9,4 @@ RUN apt-get update -y && \
rm -rf /var/lib/apt/lists/* /var/cache/apt/archives/*
RUN pip3 install --no-cache-dir -U install setuptools pip
-RUN pip3 install --no-cache-dir cupy-cuda102==9.0.0b1 scipy optuna
+RUN pip3 install --no-cache-dir cupy-cuda102==9.0.0b2 scipy optuna
