implements builder pattern for lim

.gitignore

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+build

Dockerfile

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+FROM alpine:latest
+RUN apk --no-cache add ca-certificates
+
+WORKDIR /
+
+COPY build/lim /bin/
+
+CMD ["/bin/sh", "-c", "cat /dev/urandom | /bin/lim 16b | xxd"]

Dockerfile.build

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+FROM golang:1.10.1
+
+WORKDIR /go/src/mcquay.me/lim
+
+COPY . .
+
+RUN CGO_ENABLED=0 GOOS=linux go build -o /usr/local/bin/lim .

Makefile

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+GOFILES := $(shell find . -type f | grep go$$ )
+
+build/lim: build ${GOFILES}
+	docker build -t smcquay/lim:build . -f Dockerfile.build
+	docker create --name ext smcquay/lim:build
+	docker cp ext:/usr/local/bin/lim build/
+	docker rm -f ext
+	docker image rm smcquay/lim:build
+
+build:
+	@mkdir build
+
+.PHONY: docker-image
+docker-image: build/lim
+	docker build --no-cache -t smcquay/lim:latest  .
+
+.PHONY: clean
+clean:
+	@rm -rf build