Add files to help setting up the situation described in PR59

in #58 (comment)

dev/issues/59/Dockerfile

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+# Container to host OOMMF. Modified for solving
+# issue https://github.com/fangohr/oommf/issues/59
+#
+FROM ubuntu:22.04
+
+# Avoid asking for geographic data when installing tzdata.
+ENV DEBIAN_FRONTEND noninteractive
+
+# install OOMMF dependencies and git
+RUN apt-get -y update && \
+    apt-get install -y git tk-dev tcl-dev && \
+    rm -rf /var/lib/apt/lists/*
+
+# OOMMF cannot be built as root user.
+RUN adduser oommfuser
+RUN mkdir /io  # Create working directory for mounting.
+RUN chown -R oommfuser /io  # Make sure it is owned by the user.
+# become the oommfuser for the future
+USER oommfuser
+
+# cd into mounting directory
+WORKDIR /io
+
+# Quick sanity check (not needed)
+RUN cat /etc/issue
+

dev/issues/59/Makefile

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+build: Dockerfile Makefile
+	docker build -t oommf59 .
+	@# oommf59 is the name of the docker image.
+
+# use this if the container needs to be rebuilt and docker is caching too many steps in the Dockerfile
+build-force: Dockerfile Makefile
+	docker build --no-cache -t oommf59 .
+
+clonerepo:
+	@# This cloned version of the repo will be visible in the container (under /io/repo).
+	@# So editing of the files can be done on the host in the ~repo~ directory, and
+	@# building can be done inside the container
+	git clone https://github.com/fangohr/oommf.git repo
+	@# Check out right branch with the modifications (https://github.com/fangohr/oommf/pull/58)
+	cd repo && git fetch -a && git checkout add-configuration-for-linux-arm64
+
+run:
+	docker run --rm -ti -v `pwd`:/io oommf59 bash
+	@# options: --rm : remove docker container when execution stops
+              -ti : allow terminal interaction between host and container
+              -v : mount the `pwd` Volume on the host to /io in the container
+
+
+

dev/issues/59/readme.txt

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+Setup linux on ARM64 using Docker
+---------------------------------
+
+- install docker and start Docker, so that `docker --version` reports a version
+  rather than a `command not found`.
+
+  Might work with `brew install --cask docker`
+
+- checkout the right branch: `git checkout add-configuration-for-linux-arm64` from this oommf repository.
+
+- build the docker image by going to this folder (`dev/issues/59`) and run `make build`
+
+- clone the repository (again) into a subfolder in `dev/issues/59` by running
+  `make clonerepo`. This should checkout the right branch (again:
+  `add-configuration-for-linux-arm64`) so that the partially modified OOMMF
+  files are available. It will create a subdirectory `repo` which is the one to
+  experiment with. Files in this `repo` directory will be seen inside the
+  container but can be modified from outside the container (and are thus also
+  persistent across docker sessions).
+
+- start the docker container using `make run`. We are now inside the container,
+  and have the repository in the subdirectory `repo`. The subdirectory
+  `repo/oommf` contains the normal sources. Hans would use `cd repo && make
+  build` to trigger the OOMMF compilation, but if you are familiar with oommf
+  you would probably use pimake commands in `repo/oommf`.
+
+  Example::
+
+     oommfuser@7894d7d330a4:/io/repo/oommf$ tclsh oommf.tcl +platform
+     OOMMF release 2.0b0
+     Platform Name:           linux-arm64
+     Tcl name for OS:         Linux 5.15.49-linuxkit
+     C++ compiler:            /usr/bin/g++
+     Shell details ---        
+      tclsh (running):        /usr/bin/tclsh
+                              (links to /usr/bin/tclsh8.6)
+                              --> Version 8.6.12, 64 bit, threaded
+      tclsh (OOMMF):          /usr/bin/tclsh8.6
+                              --> Version 8.6.12, 64 bit, threaded
+      tclConfig.sh:           /usr/lib/aarch64-linux-gnu/tclConfig.sh
+                              --> Version 8.6.12
+      wish (OOMMF):           /usr/bin/wish8.6
+      tkConfig.sh:            /usr/lib/aarch64-linux-gnu/tkConfig.sh
+                              --> Tk Version 8.6.12
+     OOMMF threads:           Yes: Default thread count = 4
+     OOMMF API index:         20181207
+     Temp file directory:     /tmp
+
+