initial build

.vscode/numbered-bookmarks.json

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+{
+	"bookmarks": []
+}

Dockerfile

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+# simple netcat (BSD) persistent echo server running on port 5555
+# running on Alpine Linux
+
+FROM alpine:3.11
+
+# standardized labels
+LABEL maintainer="Asif Bacchus <asif@bacchus.cloud>"
+LABEL org.label-schema.cmd="docker run --rm -t -p <ipaddr>:<host port>:5555 --name ab-netcat docker.asifbacchus.app/ab-netcat"
+LABEL org.label-schema.description="Persistent netcat (BSD) echo 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="0.1"
+LABEL org.label-schema.build-date=${BUILD_DATE}
+
+#EOF

entrypoint.sh

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+#!/bin/sh
+
+#
+### run supplied CMD
+#
+
+exec "$@"
+
+#EOF