add Dockerfile to run aboutcode with docker

Dockerfile

@@ -0,0 +1,33 @@
+#
+# Copyright (c) nexB Inc. and others. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0
+# See http://www.apache.org/licenses/LICENSE-2.0 for the license text.
+# See https://github.com/nexB/aboutcode-toolkit for support or download.
+# See https://aboutcode.org for more information about nexB OSS projects.
+#
+
+FROM python:3.6-slim-buster 
+
+RUN apt-get update \
+ && apt-get install -y bash bzip2 xz-utils zlib1g libxml2-dev libxslt1-dev libgomp1 libpopt0\
+ && apt-get clean \
+ && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
+
+# Create directory for aboutcode sources
+RUN mkdir aboutcode-toolkit
+
+# Copy sources into docker container
+COPY . aboutcode-toolkit
+
+# Set workdir
+WORKDIR aboutcode-toolkit
+
+RUN bash -c "source ./configure"
+
+# Add aboutcode to path
+#ENV PATH=$HOME/aboutcode-toolkit:$PATH
+
+# Set entrypoint to be the aboutcode command, allows to run the generated docker image directly with the aboutcode arguments: 
+# `docker run (...) <containername> <about arguments>`
+# Example: docker run --rm --name "aboutcode" -v ${PWD}:/project -v /tmp/result:/result aboutcode-toolkit attrib /project /result/c.html
+ENTRYPOINT ["./bin/about"]