feat(pkg): adding nfpm packaging

README.md

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+# 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.

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