Dockerfile

FROM heroku/heroku:16

ENV LANG C.UTF-8

# Install required packages.
RUN apt-get update
RUN apt-get upgrade -y --assume-yes
# Install packages for stack and ghc.
RUN apt-get install -y --assume-yes xz-utils gcc libgmp-dev zlib1g-dev
# Install packages needed for libraries used by our app.
RUN apt-get install -y --assume-yes libpq-dev
# Install convenience utilities, like tree, ping, and vim.
RUN apt-get install -y --assume-yes tree iputils-ping vim-nox

# Remove apt caches to reduce the size of container.
RUN rm -rf /var/lib/apt/lists/*
RUN apt-get update

# Install node.js
RUN curl -sL https://deb.nodesource.com/setup_8.x -o nodesource_setup.sh
RUN bash nodesource_setup.sh
RUN apt-get install nodejs
RUN apt-get install -y build-essential libssl-dev
RUN apt-get update

# Install sudo
RUN apt-get update && \
      apt-get -y install sudo

# Install elm
RUN sudo npm install -g -y elm --unsafe-perm=true
RUN apt-get update

# Install stack
RUN curl -sSL https://get.haskellstack.org/ | sh
RUN apt-get update

# Show versions
RUN stack --version
RUN elm --version

# Create /opt/servant-on-heroku/bin and /opt/servant-on-heroku/src.
# Set /opt/servant-on-heroku/src as the working directory.
RUN mkdir -p /opt/pollution-info-service/src
RUN mkdir -p /opt/pollution-info-service/bin
WORKDIR /opt/pollution-info-service/src

# Set the PATH for the root user so they can use stack.
ENV PATH "$PATH:/opt/stack/bin:/opt/pollution-info-service/bin"

# Copy essential project files
COPY ./stack.yaml /opt/pollution-info-service/src/stack.yaml
COPY ./package.yaml /opt/pollution-info-service/src/package.yaml
COPY ./pollution-info-service.cabal /opt/pollution-info-service/src/pollution-info-service.cabal
COPY ./Makefile /opt/pollution-info-service/src/Makefile

# Install GHC using stack, based on your app's stack.yaml file.
COPY . /opt/pollution-info-service/src
RUN stack setup

# Install all dependencies in app's .cabal file.
RUN stack test --only-dependencies

# Build application.
WORKDIR /opt/pollution-info-service/src/client
RUN elm package install -y
WORKDIR /opt/pollution-info-service/src
RUN stack build
WORKDIR /opt/pollution-info-service/src/client
RUN make
WORKDIR /opt/pollution-info-service/src

# Add the apiuser and setup their PATH.
RUN useradd -ms /bin/bash apiuser
RUN chown -R apiuser:apiuser /opt/pollution-info-service
USER apiuser
ENV PATH "$PATH:/opt/stack/bin:/opt/pollution-info-service/src/.stack-work/install/x86_64-linux/lts-8.21/8.0.2/bin"

# Set the working directory as /opt/servant-on-heroku/src.
WORKDIR /opt/pollution-info-service/src

# Set path for executing container.
CMD /opt/pollution-info-service/src/.stack-work/install/x86_64-linux/lts-8.21/8.0.2/bin/server