add dockerfile and instructions

DOCKER_INSTRUCTIONS.md

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+This repository builds and runs a Docker container with everything you need to run IPOPTR. In addition, the directory `r` is mounted into the container at run time. In other words, programs saved in this folder can be opened and modified in the container.
+
+To compile IPOPTR with HSL, download the HSL source code and move the unzipped folder (in my case this was called `coinhsl-2019.05.21/`) to the base of this directory. When the Docker image is built, HSL will compile.
+
+If your folder with HSL is called something different, you may need to modify the follow line in the `Dockerfile` or simply comment it out:
+
+```
+COPY ./coinhsl-2019.05.21 /ipopt_df/CoinIpopt/ThirdParty/HSL
+```  
+
+## Requirements
+
+1. [Docker](https://docs.docker.com/installation/)
+
+## Firing up
+
+```
+docker build -t MY_CONTAINER . # build your image
+docker run -p 80:8787 --name="SOME_NAME" -e ROOT=TRUE -e USER=peter -e PASSWORD=peter -v $(pwd)/r_scripts:/home/peter/r -d MY_CONTAINER:latest
+```
+
+Note that you can pick any `--name`, `USER`, and `PASSWORD`. Make sure to swap out your `USER` in `/home/peter/r_scripts`.
+
+
+## Get into it
+
+Now travel to the appropriate IP address in your browser (in this case, it's `http://localhost:80`) and log into R studio with the `USER` and `PASSWORD` you provided when you ran the container.

Dockerfile

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+FROM rocker/rstudio:4.0.0
+FROM rocker/tidyverse
+
+MAINTAINER Peter Metz <[email protected]>
+
+WORKDIR /ipopt_df
+
+COPY ./r /ipopt_df/r
+
+# IPoptr envrionment directory
+ENV IPOPTR_DIR=/ipopt_df/CoinIpopt/build/Ipopt/contrib
+
+# Give the user root access
+RUN echo "$USER ALL = NOPASSWD: ALL" >> /etc/sudoers && \
+
+    apt-get update && apt-get install -y \
+        gcc g++ gfortran git patch wget pkg-config liblapack-dev libmetis-dev && \
+
+##################
+# Download ipoptr source
+# http://www.coin-or.org/Ipopt/documentation/node10.html
+##################
+    cd /ipopt_df && \
+    wget http://www.coin-or.org/download/source/Ipopt/Ipopt-3.12.13.tgz && \
+    gunzip Ipopt-3.12.13.tgz && \
+    tar -xvf Ipopt-3.12.13.tar && \
+    rm -rf Ipopt-3.12.13.tar && \
+    mv Ipopt-3.12.13 CoinIpopt
+
+COPY ./coinhsl-2019.05.21 /ipopt_df/CoinIpopt/ThirdParty/HSL
+
+RUN cd /ipopt_df/CoinIpopt && \
+
+# Downloading third party solvers
+    cd ThirdParty/Blas && \
+        ./get.Blas && \
+    cd ../Lapack && \
+        ./get.Lapack && \
+    cd ../ASL && \
+        ./get.ASL && \
+    cd ../Mumps && \
+        ./get.Mumps && \
+    cd ../Metis && \
+        ./get.Metis && \
+    cd ../HSL && \
+        ./configure && \
+
+##################
+# Compile ipoptr
+##################
+    cd ../../ && \
+    mkdir build && \
+    cd build && \
+    ../configure -with-pic CXXFLAGS="-fopenmp" FCFLAGS="-fopenmp" CFLAGS="-fopenmp" ADD_FFLAGS=-fPIC ADD_CFLAGS=-fPIC ADD_CXXFLAGS=-fPIC && \
+    make -j3 && \
+    make test && \
+    make install && \
+
+##################
+# Pre-install ipoptr
+##################
+    echo "install.packages('/ipopt_df/CoinIpopt/build/Ipopt/contrib/RInterface', repos=NULL, type='source')" \
+    >> installIpoptrPackage.R && \
+    r installIpoptrPackage.R && \
+    rm installIpoptrPackage.R
+
+# Default CMD from 
+# https://github.com/rocker-org/rocker/blob/master/rstudio/Dockerfile
+# CMD ["/usr/bin/supervisord", "-c", "/etc/supervisor/conf.d/supervisord.conf"]