Docker permission issue after copying files

I have the following docker file

FROM ubuntu:14.04

#Install Node
RUN apt-get update -y
RUN apt-get upgrade -y
RUN apt-get install nodejs -y
RUN apt-get install nodejs-legacy -y
RUN apt-get install npm -y
RUN update-alternatives --install /usr/bin/node node /usr/bin/nodejs 10



# Create app directory 
RUN mkdir -p /usr/src/app
WORKDIR /usr/src/app

# COPY distribution
COPY dist dist
COPY package.json package.json

# Substitute dependencies from environment variables
COPY entrypoint.sh /entrypoint.sh
RUN chmod +x /entrypoint.sh
ENTRYPOINT ["/entrypoint.sh"]

EXPOSE 8000

And here is the entrypoint script

#!/bin/sh
cp package.json /usr/src/app/dist/
cd /usr/src/app/dist/
echo "starting server"
exec npm start

When I run the image it fails with this error

sh: 1: http-server: not found
npm ERR! weird error 127
npm WARN This failure might be due to the use of legacy binary "node"
npm WARN For further explanations, please read
/usr/share/doc/nodejs/README.Debian

I tried various kinds of installation but still get the same error, I also tried checking if the node_modules conatins the http-server executable and it does. I tried forcing 777 permission on all the files but still running into the same error

What could be the problem?

via user_mda