Make small docker images based on Alpine

For that we need a Dockerfile and a cross compiled executable.

Package creation of the executable up into a Makefile.

This requires go1.5+ for each cross compilation.

Author: Edward Muller

.gitignore

@@ -1 +1,2 @@
 .env
+.docker_build/

Dockerfile

@@ -0,0 +1,12 @@
+FROM alpine:latest
+
+MAINTAINER Edward Muller <edward@heroku.com>
+
+WORKDIR "/opt"
+
+ADD .docker_build/go-getting-started /opt/bin/go-getting-started
+ADD ./templates /opt/templates
+ADD ./static /opt/static
+
+CMD ["/opt/bin/go-getting-started"]
+

Godeps/Godeps.json

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+GO_BUILD_ENV := GOOS=linux GOARCH=amd64
+DOCKER_BUILD=$(shell pwd)/.docker_build
+DOCKER_CMD=$(DOCKER_BUILD)/go-getting-started
+
+$(DOCKER_CMD): clean
+	mkdir -p $(DOCKER_BUILD)
+	$(GO_BUILD_ENV) go build -v -o $(DOCKER_CMD) .
+
+clean:
+	rm -rf $(DOCKER_BUILD)
+
+heroku: $(DOCKER_CMD)
+	heroku container:push web