Add a Dockerfile

Dockerfile

+FROM debian:buster AS build
+RUN apt-get -q update && \
+    env DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
+        python3 python3-setuptools python3-wheel
+
+COPY setup.* /src/
+COPY nospam/ /src/nospam/
+WORKDIR /src
+RUN python3 setup.py bdist_wheel
+
+FROM debian:buster
+
+COPY --from=build /src/dist/nospam*.whl /tmp/
+RUN apt-get -q update && \
+    env DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
+        curl crm114 python3 python3-setuptools python3-pip \
+        python3-gevent python3-googleapi python3-yaml && \
+    pip3 install /tmp/nospam*.whl && \
+    rm -fr /var/lib/apt/lists/* && rm -f /tmp/*.whl
+
+COPY nospam/conf/update-surbl /usr/bin/update-surbl
+COPY nospam/conf/docker-start.sh /usr/bin/nospamd
+
+ENTRYPOINT ["/usr/bin/nospamd"]

nospam/conf/docker-start.sh

+#!/bin/sh
+
+dir=${NOSPAM_SURBL_DIR:-/var/lib/nospam}
+
+test -d ${dir} || mkdir -p ${dir}
+
+if [ ! -e ${dir}/two-level-tlds ]; then
+    /usr/bin/update-surbl
+fi
+
+exec /usr/local/bin/nospamd "$@"