add circleci config and update makefile for ci

.circleci/config.yml

@@ -0,0 +1,11 @@
+version: 2
+jobs:
+ build:
+   machine: true
+   steps:
+     - checkout
+     - run: make dist
+     - store_artifacts:
+         path: output
+     - run: echo "$DOCKER_PASS" | docker login --username $DOCKER_USER --password-stdin
+     - run: make ci-upload-images

Makefile

@@ -1,7 +1,27 @@
-default: build
+APPNAME := docker-linux-vm
+IMAGENAME := sneak/$(APPNAME)
+BUILDTIMEFILENAME := $(shell date -u '+%Y%m%d-%H%M%SZ')
 
-build:
-	docker build -t sneak/docker-linux-vm .
+default: build-docker-image
 
 run:
-	docker run -ti sneak/docker-linux-vm
+	docker run -ti $(IMAGENAME)
+
+dist: build-docker-image
+	-mkdir -p ./output
+	docker save $(IMAGENAME) | bzip2 > output/$(BUILDTIMEFILENAME).$(APPNAME).tbz2
+
+hub: upload-docker-image
+
+build-docker-image:
+	docker build -t $(IMAGENAME) .
+
+upload-docker-image: build-docker-image
+	docker tag $(IMAGENAME) $(IMAGENAME):$(BUILDTIMETAG)
+	docker push $(IMAGENAME):$(BUILDTIMETAG)
+
+ci-upload-images:
+	docker tag $(IMAGENAME) $(IMAGENAME):$(CIRCLE_SHA1)
+	docker tag $(IMAGENAME) $(IMAGENAME):$(CIRCLE_BRANCH)
+	docker push $(IMAGENAME):$(CIRCLE_SHA1)
+	docker push $(IMAGENAME):$(CIRCLE_BRANCH)