docker bash: npm: command not found after building container

I'm building an image with the the below Dockerfile.

But after building, when I run npm install it says bash: npm: command not found

I have 2 RUN commands to build 2 layers, the first one is basically to build the Python environment for the image, including installing pyodbc driver and install the necessary packages.

The second layer is to install node.

Which step is wrong with the dockerfile?

ARG VARIANT=3
FROM mcr.microsoft.com/vscode/devcontainers/python:0-${VARIANT}

# Avoid warnings by switching to noninteractive
ENV DEBIAN_FRONTEND=noninteractive

ENV PYTHONUNBUFFERED 1

ARG USERNAME=vscode
ARG USER_UID=1000
ARG USER_GID=$USER_UID

# [Optional] Update UID/GID if needed
RUN if [ "$USER_GID" != "1000" ] || [ "$USER_UID" != "1000" ]; then \
    groupmod --gid $USER_GID $USERNAME \
    && usermod --uid $USER_UID --gid $USER_GID $USERNAME \
    && chmod -R $USER_UID:$USER_GID /home/$USERNAME; \
    fi


# [Optional] If your requirements rarely change, uncomment this section to add them to the image.
#
COPY requirements.txt /tmp/pip-tmp/
RUN curl https://packages.microsoft.com/keys/microsoft.asc | apt-key add - \
    && curl https://packages.microsoft.com/config/debian/10/prod.list > /etc/apt/sources.list.d/mssql-release.list \
    && apt-get -y update \
    && ACCEPT_EULA=Y apt-get -y install msodbcsql17 \
    && ACCEPT_EULA=Y apt-get -y install mssql-tools \
    && echo 'export PATH="$PATH:/opt/mssql-tools/bin"' >> ~/.bash_profile \
    && echo 'export PATH="$PATH:/opt/mssql-tools/bin"' >> ~/.bashrc \
    && /bin/bash -c "source ~/.bashrc" \
    && apt-get install -y unixodbc-dev \
    && pip3 install django-mssql-backend \
    && apt-get install -y libgssapi-krb5-2 \
    && pip3 --disable-pip-version-check --no-cache-dir install -r /tmp/pip-tmp/requirements.txt \
    && rm -rf /tmp/pip-tmp

# ** [Optional] Uncomment this section to install additional packages. **
#
RUN apt-get update \
    && apt-get -y install --no-install-recommends apt-utils dialog 2>&1 \
    #
    # Verify git, process tools, lsb-release (common in install instructions for CLIs) installed
    && apt-get -y install git iproute2 procps lsb-release \
    #
    # Install pylint
    #&& pip install pylint \
    #
    # Update Python environment based on requirements.txt
    # && pip --disable-pip-version-check --no-cache-dir install -r /tmp/pip-tmp/requirements.txt \
    # && rm -rf /tmp/pip-tmp \
    #
    # Install node for building front-ends
    && apt-get update \
    && apt-get -y install curl gnupg \
    && curl -sL https://deb.nodesource.com/setup_14.x  | bash - \
    && apt-get -y install nodejs \
    #
    # Clean up
    && apt-get autoremove -y \
    && apt-get clean -y \
    && rm -rf /var/lib/apt/lists/*


# Switch back to dialog for any ad-hoc use of apt-get
ENV DEBIAN_FRONTEND=