Added instructions for how to build the package in a Docker container

docker/Dockerfile

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+FROM debian:bullseye
+
+RUN apt-get -yqq update
+RUN apt-get -yqq install build-essential nano cmake dpkg-dev devscripts \
+                         debhelper-compat libcdd-dev libgmp-dev \
+                         texlive-latex-base texlive-plain-generic \
+                         libbz2-dev libqsopt-ex-dev txt2man zlib1g-dev
+
+WORKDIR /home/

docker/README.md

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+# Building the TOPCOM Debian package
+Building the debian package can be a little annoying the first time, so I collected the instructions and tools I used to build it. There is a Dockerfile that is used to produce a Docker image with all of the necessary dependencies. In the Docker container the command used to build the package is either
+```bash
+dpkg-buildpackage -rfakeroot -b -uc -us
+```
+or
+```bash
+debuild -b -uc -us
+```
+The full instructions to build a Debian package were originally taken from this [website](https://ostechnix.com/how-to-build-debian-packages-from-source/).
+
+### Note
+When you build the package it will change a bunch of the files in the repository and create new ones. Therefore, you should make a temporary copy of the directory to be used for this. Otherwise, committing new changes to the repository will become a mess.