Cannot expose port from container to host, using PHP static webserver - php

Question

I have this multi-stage build in a Dockerfile:
## Stage 1
FROM node:9 as builder
RUN apt-get update && apt-get -y install sudo
RUN echo "newuser ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers
RUN useradd -ms /bin/bash newuser
USER newuser
RUN mkdir -p /home/newuser/app
WORKDIR /home/newuser/app
RUN sudo chown -R $(whoami) $(npm config get prefix)/lib
RUN npm set progress=false
RUN npm config set depth 0
RUN npm cache clean --force
COPY dist .
## Stage 2
FROM php:5.6.30
RUN apt-get update && apt-get -y install sudo
RUN echo "newuser ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers
RUN useradd -ms /bin/bash newuser
USER newuser
RUN mkdir -p /home/newuser/app
WORKDIR /home/newuser/app
COPY --from=builder /home/newuser/app /home/newuser/app
RUN ls -a /home/newuser/app
CMD ["php", "-S", "localhost:3000"]
the image build successfully, using:
docker build -t x .
Then I run it with:
docker run -p 3000:3000 x
but when I go to localhost:3000 on the host machine, I don't get a response. The webpage is blank.
Does anyone know why that might happen?
I also tried:
CMD ["sudo", "php", "-S", "localhost:80"]
and
docker run -p 3000:80 x
and a few other variations, still nothing.

Answer 1

Not sure why the PHP static server wasn't working, but I got it working with Node.js static server package:
FROM node:9 as builder
RUN apt-get update && \
apt-get -y install sudo
RUN echo "newuser ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers
RUN useradd -ms /bin/bash newuser
USER newuser
RUN mkdir -p /home/newuser/app
WORKDIR /home/newuser/app
RUN sudo chown -R $(whoami) $(npm config get prefix)/lib
RUN sudo chown -R $(whoami) $(npm config get prefix)/lib/node_modules
RUN sudo chown -R $(whoami) $(npm config get prefix)/bin
RUN sudo chown -R $(whoami) $(npm config get prefix)/share
RUN sudo chown -R $(whoami) /usr/local/lib
RUN npm set progress=false
RUN npm config set depth 0
RUN npm cache clean --force
COPY dist .
RUN npm install -g http-server
ENTRYPOINT ["http-server", "."]
you build it like so:
docker build -t x .
and then run it like so:
docker run -p 3000:8080 x