build: Added Dockerfile for a container installation

Dockerfile

@@ -0,0 +1,38 @@
+## Build the docker image using:
+# docker build --build-arg USERNAME=$USER --build-arg USER_UID --no-cache -t pycsep .
+
+## Docker instructions
+
+# Install Docker image from trusted source
+FROM python:3.9.18-slim-bullseye
+
+# Setup user id and permissions.
+ARG USERNAME=modeler
+ARG USER_UID=1100
+ARG USER_GID=$USER_UID
+RUN groupadd --non-unique -g $USER_GID $USERNAME \
+    && useradd -u $USER_UID -g $USER_GID -s /bin/sh -m $USERNAME
+
+# Install git
+RUN apt update
+RUN apt install -y git
+
+# Set up work directory in the Docker container.
+WORKDIR /usr/src/
+
+# Set up and create python virtual environment
+ENV VIRTUAL_ENV=/opt/venv
+RUN python3 -m venv $VIRTUAL_ENV
+ENV PATH="$VIRTUAL_ENV/bin:$PATH"
+
+# Install pycsep.
+RUN git clone https://github.com/SCECcode/pycsep.git
+RUN pip install --no-cache-dir --upgrade pip
+RUN cd pycsep && pip install .
+
+# Docker can now be initialized as user
+USER $USERNAME
+
+## Run the docker image in interactive mode from the command line
+# docker run -it --rm --name pycsep pycsep:latest
+