Retool build system

Dockerfile

@@ -1,4 +1,15 @@
-FROM alpine:3.11
+FROM alpine:3
+
+ARG VERSION
+ARG BUILD_DATE
+ARG VCS_REF
+LABEL maintainer="Stark & Wayne <[email protected]>" \
+      summary="Concourse Slack Notifications Resource" \
+      version=$VERSION \
+      org.label-schema.build-date=$BUILD_DATE \
+      org.label-schema.vcs-url="https://github.com/cloudfoundry-community/slack-notification-resource.git" \
+      org.label-schema.vcs-ref=$VCS_REF \
+      org.label-schema.schema-version="1.0.0"
 
 RUN apk add --no-cache curl bash jq gettext-dev
 

Makefile

@@ -0,0 +1,17 @@
+IMAGE   ?= cfcommunity/slack-notification-resource
+VERSION ?= dev
+
+build:
+	docker build \
+	  --build-arg BUILD_DATE="$(shell date -u --iso-8601)" \
+	  --build-arg VCS_REF="$(shell git rev-parse --short HEAD)" \
+	  --build-arg vERSION="$(VERSION)" \
+	  . -t $(IMAGE):$(VERSION)
+
+push: build
+	docker push $(IMAGE):$(VERSION)
+
+release: build
+	docker tag $(IMAGE):$(VERSION) $(IMAGE):latest
+	docker push $(IMAGE):latest
+	docker push $(IMAGE):$(VERSION)

README.md

@@ -280,8 +280,25 @@ body: {
 
 ```
 
+## Release Engineering
 
+To build local versions of this, for testing:
 
+    $ docker build -t slack-notification-resources
+
+Tests will run as part of the build, and be left in the image for
+future testing.  This adds about 100k to the image.
+
+To cut a new officialy release of the
+`cfcommunity/slack-notification-resource` image on
+[Docker Hub][hub]:
+
+    $ make VERSION=x.y.z release
+
+
+
+
+[hub]:    https://hub.docker.com/r/cfcommunity/slack-notification-resource
 [attach]: https://api.slack.com/docs/message-attachment
 [uidmap]: https://api.slack.com/changelog/2017-09-the-one-about-usernames#mapping
 [chans]:  https://api.slack.com/docs/message-formatting#linking_to_channels_and_users