node installed in docker container but not npm - docker

Question

I have this DockerFile
FROM docker:17.12.0-ce as static-docker-source
FROM ubuntu:18.04
FROM python:3.8-slim-buster
ARG CLOUD_SDK_VERSION=335.0.0
ENV CLOUD_SDK_VERSION=$CLOUD_SDK_VERSION
ENV PATH "$PATH:/opt/google-cloud-sdk/bin/"
COPY --from=static-docker-source /usr/local/bin/docker /usr/local/bin/docker
RUN apt-get -qqy update && apt-get install -qqy \
curl \
gcc \
apt-transport-https \
lsb-release \
openssh-client \
git \
gnupg && \
pip install crcmod && \
export CLOUD_SDK_REPO="cloud-sdk-$(lsb_release -c -s)" && \
echo "deb https://packages.cloud.google.com/apt $CLOUD_SDK_REPO main" > /etc/apt/sources.list.d/google-cloud-sdk.list && \
curl https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add - && \
apt-get update && \
apt-get install -y google-cloud-sdk=${CLOUD_SDK_VERSION}-0 \
google-cloud-sdk-app-engine-python=${CLOUD_SDK_VERSION}-0 \
google-cloud-sdk-app-engine-python-extras=${CLOUD_SDK_VERSION}-0 \
google-cloud-sdk-cbt=${CLOUD_SDK_VERSION}-0 \
kubectl && \
gcloud --version && \
docker --version && kubectl version --client
VOLUME ["/root/.config"]
RUN curl -sL https://deb.nodesource.com/setup_8.x | bash -
RUN curl -sL https://sentry.io/get-cli/ | bash -
RUN apt-get install -y nodejs build-essential pkg-config libcairo2-dev libjpeg-dev libgif-dev
ADD requirements.txt /
ADD requirements-prod.txt /
ADD submodules /
RUN python --version
RUN pip3 install --upgrade pip
RUN pip3 install -r /requirements.txt
RUN pip3 install -r /requirements-prod.txt
when I run node --version it returns v10.24.0 (I think it should be 8.x.y ....).
And when I run npm --version it returns bash: npm: command not found
Shouldn't node install npm too ?
Thanks

Answer 1

So I fixed it by changing my DockerFile.
I deleted FROM python:3.8-slim-buster as I read that having multiple 'FROM' on a dockerfile could cause conflict. And I installed python with apt like this:
RUN apt-get -qqy update && apt-get install -qqy \
curl \
gcc \
python3.8 \
python3-pip \
python3.8-dev \
However, it is not perfect to me because I now have python3.6.x under python 3, python 2.7.x under python and I must specified python3.8 when I need it...
My new DockerFile:
FROM docker:17.12.0-ce as static-docker-source
FROM ubuntu:18.04
ARG CLOUD_SDK_VERSION=335.0.0
ENV CLOUD_SDK_VERSION=$CLOUD_SDK_VERSION
ENV PATH "$PATH:/opt/google-cloud-sdk/bin/"
COPY --from=static-docker-source /usr/local/bin/docker
/usr/local/bin/docker
RUN apt-get -qqy update && apt-get install -qqy \
curl \
gcc \
python3.8 \
python3-pip \
python3.8-dev \
apt-transport-https \
lsb-release \
openssh-client \
git \
gnupg && \
pip3 install crcmod && \
export CLOUD_SDK_REPO="cloud-sdk-$(lsb_release -c -s)" && \
echo "deb https://packages.cloud.google.com/apt $CLOUD_SDK_REPO main" > /etc/apt/sources.list.d/google-cloud-sdk.list && \
curl https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add - && \
apt-get update && \
apt-get install -y google-cloud-sdk=${CLOUD_SDK_VERSION}-0 \
google-cloud-sdk-app-engine-python=${CLOUD_SDK_VERSION}-0 \
google-cloud-sdk-app-engine-python-extras=${CLOUD_SDK_VERSION}-0 \
google-cloud-sdk-cbt=${CLOUD_SDK_VERSION}-0 \
kubectl && \
gcloud --version && \
docker --version && kubectl version --client
VOLUME ["/root/.config"]
RUN curl -sL https://deb.nodesource.com/setup_8.x | bash -
RUN curl -sL https://sentry.io/get-cli/ | bash -
RUN apt-get install -y nodejs build-essential pkg-config libcairo2-dev
libjpeg-dev libgif-dev
RUN node --version
RUN npm --version
RUN python --version
ADD requirements.txt /
ADD requirements-prod.txt /
ADD submodules /
RUN python --version
RUN pip3 install --upgrade pip
RUN pip3 install -r /requirements.txt
RUN pip3 install -r /requirements-prod.txt