Task: Add docker container inside alpine linux for docker image and github workflows

.github/workflows/docker-publish.yml

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+name: Docker CI
+
+on:
+  push:
+    branches: [ main ]
+
+jobs:
+  docker:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+      -
+        name: Login to DockerHub
+        uses: docker/login-action@v1
+        with:
+          username: ${{ secrets.DOCKER_HUB_USERNAME }}
+          password: ${{ secrets.DOCKER_HUB_SECRET }}
+      -
+        name: Checkout
+        uses: actions/checkout@v2
+
+      -
+        name: Build and Push from Makefile
+        run: |
+          make build

.gitignore

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+.dccache

Dockerfile

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+FROM cubetiq/calpine-os-linux:latest
+LABEL maintainer="sombochea@cubetiqs.com"
+
+RUN apk add --no-cache \
+		ca-certificates \
+		openssh-client
+
+RUN [ ! -e /etc/nsswitch.conf ] && echo 'hosts: files dns' > /etc/nsswitch.conf
+
+ENV DOCKER_VERSION 20.10.7
+
+RUN set -eux; \
+	\
+	apkArch="$(apk --print-arch)"; \
+	case "$apkArch" in \
+		'x86_64') \
+			url='https://download.docker.com/linux/static/stable/x86_64/docker-${DOCKER_VERSION}.tgz'; \
+			;; \
+		'armhf') \
+			url='https://download.docker.com/linux/static/stable/armel/docker-${DOCKER_VERSION}.tgz'; \
+			;; \
+		'armv7') \
+			url='https://download.docker.com/linux/static/stable/armhf/docker-${DOCKER_VERSION}.tgz'; \
+			;; \
+		'aarch64') \
+			url='https://download.docker.com/linux/static/stable/aarch64/docker-${DOCKER_VERSION}.tgz'; \
+			;; \
+		*) echo >&2 "error: unsupported architecture ($apkArch)"; exit 1 ;; \
+	esac; \
+	\
+	wget -O docker.tgz "$url"; \
+	\
+	tar --extract \
+		--file docker.tgz \
+		--strip-components 1 \
+		--directory /usr/local/bin/ \
+	; \
+	rm docker.tgz; \
+	\
+	dockerd --version; \
+	docker --version
+
+COPY modprobe.sh /usr/local/bin/modprobe
+COPY docker-entrypoint.sh /usr/local/bin/
+RUN chmod +x /usr/local/bin/docker-entrypoint.sh
+RUN chmod +x /usr/local/bin/modprobe
+
+ENV DOCKER_TLS_CERTDIR=/certs
+RUN mkdir /certs /certs/client && chmod 1777 /certs /certs/client
+
+ENTRYPOINT ["docker-entrypoint.sh"]
+CMD ["sh"]

Makefile

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+DOCKER_IMAGE=cubetiq/calpine-docker
+DOCKER_IMAGE_NAME=${DOCKER_IMAGE}:20.10.7
+
+build:
+	@echo 'Starting docker build'
+	docker build . -t ${DOCKER_IMAGE}
+
+	@echo 'Starting docker push'
+	docker tag ${DOCKER_IMAGE} ${DOCKER_IMAGE_NAME}
+	docker push ${DOCKER_IMAGE}
+	docker push ${DOCKER_IMAGE_NAME}
+
+.PHONY:build

README.md

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+# CUBETIQ Alpine OS Linux with Docker 20.10.7
+![Docker Image Size (latest by date)](https://img.shields.io/docker/image-size/cubetiq/calpine-docker)
+![Docker Pulls](https://img.shields.io/docker/pulls/cubetiq/calpine-docker)
+
+- CUBETIQ Alpine OS Linux (3.13.3)
+- Docker (20.10.7)
+
+# [Docker Hub](https://hub.docker.com/r/cubetiq/calpine-docker)
+```shell
+docker push cubetiq/calpine-docker
+```
+
+# Usage
+```shell
+docker run --rm -it cubetiq/calpine-docker /bin/sh
+```
+
+# Example
+```Dockerfile
+FROM cubetiq/calpine-docker:latest
+LABEL maintainer="sombochea@cubetiqs.com"
+
+RUN docker version
+
+CMD [ "sh" ]
+```
+
+# Reference
+- Docker: [GitHub](https://github.com/docker-library/docker/tree/279ba9c93e8e26a15171645bd511ea8476c4706e/20.10)
+
+# Contributors
+- Sambo Chea <sombochea@cubetiqs.com>
+
+# License
+```text
+MIT License
+
+Copyright (c) 2018-2020 Dave Hall <skwashd@gmail.com>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECT
+```

modprobe.sh

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+#!/bin/sh
+set -eu
+
+for module; do
+	if [ "${module#-}" = "$module" ]; then
+		ip link show "$module" || true
+		lsmod | grep "$module" || true
+	fi
+done
+
+export PATH='/usr/sbin:/usr/bin:/sbin:/bin'
+exec modprobe "$@"