fix(doc): adding doc for packaging command

README.md

@@ -0,0 +1,22 @@
+# Alpine Docker compose service
+
+## Run docker-compose services as openrc services
+
+Copy the script init.d/dc to /etc/init.d/dc.
+
+Each docker-compose based service $SERVICENAME must exist like so: 
+ * /srv/docker/$SERVICENAME/docker-compose.yml.
+
+Finally create some symbolic link :
+ * ln -s /etc/init.d/dockerservice.$SERVICENAME pointing to /etc/init.d/dc. 
+
+Services can now be started/stopped via e.g. /etc/init.d/dockerservice.gitea start.
+
+## Build an Alpine package
+
+You need to install "nfpm" (https://nfpm.goreleaser.com/)
+
+```
+nfpm pkg --packager apk --target .
+
+```

init.d/dc

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+#!/sbin/openrc-run
+
+# From https://github.com/0x17de/dockerservice-openrc
+
+: ${SUBCFGDIR:=/srv/docker}
+DOCKER_COMPOSE_UP_ARGS=${DOCKER_COMPOSE_UP_ARGS-"--no-build --no-recreate --no-deps"}
+
+SUBSVC="${SVCNAME#*.}"
+[ -z "${SUBSVC}" ] && exit 1
+: ${SUBCFG:="${SUBCFGDIR}/${SUBSVC}/docker-compose.yml"}
+DOCOCMD="/usr/bin/docker"
+export COMPOSE_HTTP_TIMEOUT=300
+
+description="Manage Docker services defined in ${SUBCFG}"
+extra_commands="configtest build"
+description_configtest="Check configuration via \"docker compose -f ${SUBCFG} config\""
+description_build="Run \"docker compose -f ${SUBCFG} build\""
+
+depend() {
+  need localmount net docker
+  use dns
+  after docker
+}
+
+configtest() {
+  if ! [ -f "${SUBCFG}" ]; then
+    eerror "The config file ${SUBCFG} does not exist!"
+    return 1
+  fi
+  "${DOCOCMD}" -f "${SUBCFG}" config >&/dev/null
+  if [ ${?} -ne 0 ]; then
+    einfo "config: ok"
+  else
+    eerror "config: error"
+    return 1
+  fi
+}
+
+build() {
+  configtest || return 1
+  ebegin "Building dockerservice ${SUBSVC}"
+  "${DOCOCMD}" compose -f "${SUBCFG}" build
+  eend $?
+}
+
+start() {
+  configtest || return 1
+  ebegin "Starting dockerservice ${SUBSVC}"
+  "${DOCOCMD}" compose -f "${SUBCFG}" up -d ${DOCKER_COMPOSE_UP_ARGS}
+  eend $?
+}
+
+stop() {
+  ebegin "Stopping dockerservice ${SUBSVC}"
+  "${DOCOCMD}" compose -f "${SUBCFG}" stop --timeout=300
+  eend $?
+}
+
+status() {
+  if [ "$("${DOCOCMD}" compose -f "${SUBCFG}" top | wc -l)" -gt "0" ]; then
+    einfo "status: started"
+  else
+    einfo "status: stopped"
+    return 3
+  fi
+}

nfpm.yaml

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+# nfpm example config file
+#
+# check https://nfpm.goreleaser.com/configuration for detailed usage
+#
+
+name: "dcservice"
+arch: "amd64"
+platform: "linux"
+version: "v0.0.1"
+section: "default"
+priority: "extra"
+maintainer: "Cadoles <contact@cadoles.com>"
+description: |
+  Docker Compose Openrc Services
+vendor: "Cadoles"
+homepage: "https://www.cadoles.com"
+license: "GPL-v3"
+changelog: "changelog.yaml"
+
+contents:
+- src: init.d/dc
+  dst: /etc/init.d/dc
+- src: services
+  dst: /srv/docker
+- src: init.d/dc
+  dst: /etc/init.d/dc.jslave
+  type: symlink
+
+overrides:
+  apk:
+    depends:
+    - docker-compose
+    - docker

services/jslave/docker-compose.yml

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+version: "3.9"
+services:
+  jslave:
+    env_file:
+      - /etc/jslave/jslave.conf
+    image: "reg.cadoles.com/cadoles/jenkins-slave:latest"
+    volumes:
+      - /var/run/docker.sock:/var/run/docker.sock
+      - /srv/jenkins/workspace:/workspace