我在本地机器上用streamlit，OpenCV和Torch构建了一个Web应用程序。整个项目进行得很顺利，直到我构建了一个Docker文件，并准备将其传输到我的Google Cloud Platform。谁能告诉我到底哪里出了问题？

下面是我的Dockerfile：

FROM pytorch/pytorch:latest
RUN pip install virtualenv
ENV VIRTUAL_ENV=/venv
RUN virtualenv venv -p python3
ENV PATH="VIRTUAL_ENV/bin:$PATH"

WORKDIR /app
ADD . /app

# Install dependencies
RUN pip install -r requirements.txt

# copying all files over
COPY . /app

# Expose port 
ENV PORT 8501

# cmd to launch app when container is run
CMD streamlit run app.py

# streamlit-specific commands for config
ENV LC_ALL=C.UTF-8
ENV LANG=C.UTF-8
RUN mkdir -p /root/.streamlit
RUN bash -c 'echo -e "\
[general]\n\
email = \"\"\n\
" > /root/.streamlit/credentials.toml'

RUN bash -c 'echo -e "\
[server]\n\
enableCORS = false\n\
" > /root/.streamlit/config.toml'

和requirements.txt：

albumentations==0.4.5
matplotlib==3.2.2
numpy==1.19.0
opencv-python==4.1.0.25
# opencv-python-headless==4.2.0.34
pandas==1.0.5
Pillow==7.1.2
scipy==1.5.0
streamlit==0.62.0