Docker npm Not found in debian:jessie20180831 - docker

Question

My Dockerfile
FROM debian:jessie-20180831 as builder
ENV BUILD_DEPS "curl git"
COPY . /go/src/chaochaogege.com/onlinecode
WORKDIR /go/src/chaochaogege.com/onlinecode
RUN apt-get update && apt-get install curl git sudo --no-install-recommends -y
RUN curl -sL https://deb.nodesource.com/setup_8.x | sudo -E sh -;\
apt-get install nodejs -y --no-install-recommends;
RUN cd ./client-side \
&& npm install && npm run build;
COPY ./sql ./client-side/dist/
RUN apt-get update && apt-get install ${BUILD_DEPS} -y --no-install-recommends;\
curl https://raw.githubusercontent.com/golang/dep/master/install.sh | sh; \
dep ensure -update;\
go install;
FROM golang:1.11.1-alpine3.7
RUN mkdir -p /go/src/chaochaogege.com/onlinecode
WORKDIR /go/src/chaochaogege.com/onlinecode
COPY --from=builder /go/bin/onlinecode .
COPY --from=builder /go/src/chaochaogege.com/onlinecode/client-side/dist/* .
EXPOSE 8086
ENTRYPOINT ["onlinecode"]
I don't know my happened.
From my view, I install nodejs in RUN layer, and then use npm in another layer after it.
But why not work?
There are some dupicate questions I am sure, but all of them not solve my problem.
I guess maybe npm only can be used in same docker layer? So I change Dockerfile to follow:
FROM debian:jessie-20180831 as builder
ENV BUILD_DEPS "curl git"
COPY . /go/src/chaochaogege.com/onlinecode
WORKDIR /go/src/chaochaogege.com/onlinecode
RUN apt-get update && apt-get install curl git sudo --no-install-recommends -y
RUN curl -sL https://deb.nodesource.com/setup_8.x | sudo -E sh -;\
apt-get install nodejs -y --no-install-recommends;\
npm --version; \
cd ./client-side \
&& npm install && npm run build;
COPY ./sql ./client-side/dist/
RUN apt-get update && apt-get install ${BUILD_DEPS} -y --no-install-recommends;\
curl https://raw.githubusercontent.com/golang/dep/master/install.sh | sh; \
dep ensure -update;\
go install;
FROM golang:1.11.1-alpine3.7
RUN mkdir -p /go/src/chaochaogege.com/onlinecode
WORKDIR /go/src/chaochaogege.com/onlinecode
COPY --from=builder /go/bin/onlinecode .
COPY --from=builder /go/src/chaochaogege.com/onlinecode/client-side/dist/* .
EXPOSE 8086
ENTRYPOINT ["onlinecode"]
But also get result
npm not found
Error log
Step 6/15 : RUN curl -sL https://deb.nodesource.com/setup_8.x | sudo -E sh -; apt-get install nodejs -y --no-install-recommends; npm --version; cd ./client-side && npm install && npm run build;
---> [Warning] Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
---> Running in 2788863ccf8a
Reading package lists...
Building dependency tree...
Reading state information...
The following extra packages will be installed:
libc-ares2 libv8-3.14.5
The following NEW packages will be installed:
libc-ares2 libv8-3.14.5 nodejs
0 upgraded, 3 newly installed, 0 to remove and 0 not upgraded.
Need to get 1990 kB of archives.
After this operation, 7495 kB of additional disk space will be used.
Get:1 http://deb.debian.org/debian/ jessie/main libc-ares2 amd64 1.10.0-2+deb8u2 [72.5 kB]
Get:2 http://deb.debian.org/debian/ jessie/main libv8-3.14.5 amd64 3.14.5.8-8.1 [1269 kB]
Get:3 http://deb.debian.org/debian/ jessie/main nodejs amd64 0.10.29~dfsg-2 [648 kB]
[91mdebconf: delaying package configuration, since apt-utils is not installed
[0mFetched 1990 kB in 1s (1874 kB/s)
Selecting previously unselected package libc-ares2:amd64.
(Reading database ... (Reading database ... 5% (Reading database ... 10% (Reading database ... 15% (Reading database ... 20% (Reading database ... 25% (Reading database ... 30% (Reading database ... 35% (Reading database ... 40% (Reading database ... 45% (Reading database ... 50% (Reading database ... 55% (Reading database ... 60% (Reading database ... 65% (Reading database ... 70% (Reading database ... 75% (Reading database ... 80% (Reading database ... 85% (Reading database ... 90% (Reading database ... 95% (Reading database ... 100% (Reading database ... 9841 files and directories currently installed.)
Preparing to unpack .../libc-ares2_1.10.0-2+deb8u2_amd64.deb ...
Unpacking libc-ares2:amd64 (1.10.0-2+deb8u2) ...
Selecting previously unselected package libv8-3.14.5.
Preparing to unpack .../libv8-3.14.5_3.14.5.8-8.1_amd64.deb ...
Unpacking libv8-3.14.5 (3.14.5.8-8.1) ...
Selecting previously unselected package nodejs.
Preparing to unpack .../nodejs_0.10.29~dfsg-2_amd64.deb ...
Unpacking nodejs (0.10.29~dfsg-2) ...
Setting up libc-ares2:amd64 (1.10.0-2+deb8u2) ...
Setting up libv8-3.14.5 (3.14.5.8-8.1) ...
Setting up nodejs (0.10.29~dfsg-2) ...
update-alternatives: using /usr/bin/nodejs to provide /usr/bin/js (js) in auto mode
Processing triggers for libc-bin (2.19-18+deb8u10) ...
[91m/bin/sh: 1: npm: not found

Answer 1

With apt-get install nodejs you install only node, but not npm itself. You can check the nodejs files in the debian package index.
To install npm you need to install the npm package.
So, to fix your Dockerfile edit this line:
apt-get install nodejs -y --no-install-recommends;
With:
apt-get install nodejs npm -y --no-install-recommends;