python script run in docker with error：ERROR:headless_shell.cc(434)] Abnormal renderer termination.

[taroyutao]

DockerFile：
`
FROM python:3.7
EXPOSE 9567
WORKDIR /app
COPY . /app

RUN echo "Acquire::Check-Valid-Until "false";\nAcquire::Check-Date "false";" | cat > /etc/apt/apt.conf.d/10no--check-valid-until
RUN sed -i 's|security.debian.org/debian-security|mirrors.ustc.edu.cn/debian-security|g' /etc/apt/sources.list
RUN sed -i 's#http://deb.debian.org#https://mirrors.163.com#g' /etc/apt/sources.list

RUN apt-get clean
RUN apt-get update -y && apt-get install -y icc-profiles-free
RUN apt-get update -y && apt-get install -y chromium

RUN echo 'export CHROMIUM_FLAGS="$CHROMIUM_FLAGS --no-sandbox --disable-gpu"' >> /etc/chromium.d/default-flags

RUN echo " \n =============HTML2IMAGE============= \n Welcome to the html2image CLI container ! \n Type html2image -h for help :)" >> /etc/motd
RUN echo "clear" >> /root/.bashrc
RUN echo "cat /etc/motd" >> /root/.bashrc

RUN pip config set global.index-url https://pypi.tuna.tsinghua.edu.cn/simple
RUN pip install -r requirements.txt
`

requirements.txt
`
Pillow

pytest

html2image
`

python script

`
from html2image import Html2Image
hti = Html2Image(custom_flags=['--no-sandbox','--disable-gpu', '--disable-software-rasterizer'])
hti.screenshot(url='http://www.python.org', save_as='python_org.png', size = (1500, 13000))

`

error info:

[1026/042946.265913:ERROR:bus.cc(399)] Failed to connect to the bus: Failed to connect to socket /run/dbus/system_bus_socket: No such file or directory
[1026/042946.266046:ERROR:bus.cc(399)] Failed to connect to the bus: Failed to connect to socket /run/dbus/system_bus_socket: No such file or directory
[1026/042946.268083:WARNING:bluez_dbus_manager.cc(247)] Floss manager not present, cannot set Floss enable/disable.
[1026/042946.271534:ERROR:gpu_init.cc(521)] Passthrough is not supported, GL is disabled, ANGLE is
[1026/043157.712559:ERROR:headless_shell.cc(434)] Abnormal renderer termination.