ab-netcat/Dockerfile

# simple netcat (BSD) persistent "listen" server running on port 5555
# running on Alpine Linux

FROM alpine:3.12

# standardized labels
LABEL maintainer="Asif Bacchus <asif@bacchus.cloud>"
LABEL org.label-schema.cmd="docker run --rm docker.asifbacchus.app/ab-netcat help"
LABEL org.label-schema.description="Persistent netcat (BSD) listen server on Alpine Linux"
LABEL org.label-schema.name="ab-netcat"
LABEL org.label-schema.schema-version="1.0"
LABEL org.label-schema.url="https://git.asifbacchus.app/ab-docker/ab-netcat"
LABEL org.label-schema.usage="https://git.asifbacchus.app/ab-docker/ab-netcat/wiki"
LABEL org.label-schema.vcs-url="https://git.asifbacchus.app/ab-docker/ab-netcat.git"

# install tzdata so timezone can be set
RUN apk --update --no-cache add \
    tzdata \
    netcat-openbsd

# expose port
EXPOSE 5555

# environment variables
ENV TZ=Etc/UTC

# copy files
COPY entrypoint.sh /

# entrypoint script
ENTRYPOINT [ "/entrypoint.sh" ]

# run nc persistent by default
CMD [ "nc", "-klv", "5555" ]

# add build date and version labels
ARG BUILD_DATE
LABEL org.label-schema.version="1.0"
LABEL org.label-schema.build-date=${BUILD_DATE}

#EOF