shell/nc/Dockerfile

# syntax=docker/dockerfile:1

# SPDX-FileCopyrightText: © 2024 Sebastian Davids <sdavids@gmx.de>
# SPDX-License-Identifier: Apache-2.0

# https://docs.docker.com/engine/reference/builder/

### HTTP server ###

# https://hub.docker.com/_/nginx/
FROM nginx:1.27.2-alpine3.20-slim AS http_server

RUN mkdir -p /usr/share/nginx/html/-/health && \
    touch /usr/share/nginx/html/-/health/liveness && \
    printf '<!doctype html><title>sdavids-docker-healthcheck-shell-nc</title><h1>sdavids-docker-healthcheck-shell-nc</h1>' > /usr/share/nginx/html/index.html && \
    printf 'server {listen 3000;listen [::]:3000;location / {root /usr/share/nginx/html;index index.html;}}' > /etc/nginx/conf.d/default.conf

LABEL de.sdavids.docker.group="sdavids-docker-healthcheck" \
      de.sdavids.docker.type="builder"

### final ###

FROM http_server

EXPOSE 3000

COPY --chmod=0777 src/healthcheck.sh /usr/local/bin/healthcheck

HEALTHCHECK --interval=5s --timeout=5s --start-period=5s \
    CMD healthcheck || exit 1

# https://github.com/opencontainers/image-spec/blob/master/annotations.md
LABEL org.opencontainers.image.licenses="Apache-2.0" \
      org.opencontainers.image.vendor="Sebastian Davids" \
      org.opencontainers.image.title="healthcheck-shell-nc" \
      de.sdavids.docker.group="sdavids-docker-healthcheck" \
      de.sdavids.docker.type="development"