WIP: Mutli-stage build not working

Dockerfile

@@ -1,20 +1,7 @@
 ARG REPO=library
-# FROM golang:1.11-alpine AS builder
-#
-# RUN apk add --no-cache git
-# RUN go get -u github.com/golang/dep/cmd/dep
-#
-# WORKDIR /go/src/app/
-# COPY ./Gopkg.* /go/src/app/
-# RUN dep ensure --vendor-only
-#
-# COPY ./main.go /go/src/app/
-#
-# RUN CGO_ENABLED=0 GOOS=linux GOARCH=${ARCH} go build -a -installsuffix nocgo -o dockron .
-
 FROM ${REPO}/busybox:latest
 WORKDIR /root/
-# COPY --from=builder /go/src/app/dockron .
+
 ARG ARCH=amd64
 COPY ./dockron-linux-${ARCH} ./dockron
 

Dockerfile.multi-stage

@@ -0,0 +1,16 @@
+ARG REPO=library
+FROM ${REPO}/golang:1.11-alpine AS builder
+
+COPY ./go.mod ./go.sum /go/src/app/
+
+RUN go mod download
+
+COPY ./main.go /go/src/app/
+
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=${ARCH} go build -a -installsuffix nocgo -o dockron .
+
+FROM ${REPO}/busybox:latest
+WORKDIR /root/
+COPY --from=builder /go/src/app/dockron .
+
+CMD [ "./dockron" ]

Makefile

@@ -5,28 +5,28 @@ default: build
 
 # Downloads dependencies into vendor directory
 vendor:
-	dep ensure
+	go mod vendor
 
 # Runs the application, useful while developing
 .PHONY: run
-run: vendor
+run:
 	go run *.go
 
 # Output target
-dockron: vendor
+dockron:
 	go build -o dockron
 
 # Alias for building
 .PHONY: build
 build: dockron
 
-dockron-linux-amd64: vendor
+dockron-linux-amd64:
 	GOARCH=amd64 CGO_ENABLED=0 GOOS=linux go build -a -installsuffix nocgo -o dockron-linux-amd64
 
-dockron-linux-arm: vendor
+dockron-linux-arm:
 	GOARCH=arm CGO_ENABLED=0 GOOS=linux go build -a -installsuffix nocgo -o dockron-linux-arm
 
-dockron-linux-arm64: vendor
+dockron-linux-arm64:
 	GOARCH=arm64 CGO_ENABLED=0 GOOS=linux go build -a -installsuffix nocgo -o dockron-linux-arm64
 
 .PHONY: build-all-static
@@ -36,17 +36,13 @@ build-all-static: dockron-linux-amd64 dockron-linux-arm dockron-linux-arm64
 .PHONY: clean
 clean:
 	rm dockron
+	rm dockron-linux-*
 
 # Cleans vendor directory
 .PHONY: clean-vendor
 clean-vendor:
 	rm -fr ./vendor
 
-# Attempts to update dependencies
-.PHONY: dep-update
-dep-update:
-	dep ensure -update
-
 .PHONY: docker-build
 docker-build:
 	docker build . -t ${DOCKER_TAG}-linux-amd64

go.mod

@@ -0,0 +1,15 @@
+module github.com/iamthefij/dockron
+
+go 1.12
+
+require (
+	github.com/Microsoft/go-winio v0.4.9 // indirect
+	github.com/docker/distribution v2.6.2+incompatible // indirect
+	github.com/docker/docker v1.13.1
+	github.com/docker/go-connections v0.4.0 // indirect
+	github.com/docker/go-units v0.3.3 // indirect
+	github.com/pkg/errors v0.8.0 // indirect
+	github.com/robfig/cron v1.1.0
+	golang.org/x/net v0.0.0-20180801234040-f4c29de78a2a
+	golang.org/x/sys v0.0.0-20180802203216-0ffbfd41fbef // indirect
+)

go.sum

@@ -0,0 +1,18 @@
+github.com/Microsoft/go-winio v0.4.9 h1:3RbgqgGVqmcpbOiwrjbVtDHLlJBGF6aE+yHmNtBNsFQ=
+github.com/Microsoft/go-winio v0.4.9/go.mod h1:VhR8bwka0BXejwEJY73c50VrPtXAaKcyvVC4A4RozmA=
+github.com/docker/distribution v2.6.2+incompatible h1:4FI6af79dfCS/CYb+RRtkSHw3q1L/bnDjG1PcPZtQhM=
+github.com/docker/distribution v2.6.2+incompatible/go.mod h1:J2gT2udsDAN96Uj4KfcMRqY0/ypR+oyYUYmja8H+y+w=
+github.com/docker/docker v1.13.1 h1:IkZjBSIc8hBjLpqeAbeE5mca5mNgeatLHBy3GO78BWo=
+github.com/docker/docker v1.13.1/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
+github.com/docker/go-connections v0.4.0 h1:El9xVISelRB7BuFusrZozjnkIM5YnzCViNKohAFqRJQ=
+github.com/docker/go-connections v0.4.0/go.mod h1:Gbd7IOopHjR8Iph03tsViu4nIes5XhDvyHbTtUxmeec=
+github.com/docker/go-units v0.3.3 h1:Xk8S3Xj5sLGlG5g67hJmYMmUgXv5N4PhkjJHHqrwnTk=
+github.com/docker/go-units v0.3.3/go.mod h1:fgPhTUdO+D/Jk86RDLlptpiXQzgHJF7gydDDbaIK4Dk=
+github.com/pkg/errors v0.8.0 h1:WdK/asTD0HN+q6hsWO3/vpuAkAr+tw6aNJNDFFf0+qw=
+github.com/pkg/errors v0.8.0/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/robfig/cron v1.1.0 h1:jk4/Hud3TTdcrJgUOBgsqrZBarcxl6ADIjSC2iniwLY=
+github.com/robfig/cron v1.1.0/go.mod h1:JGuDeoQd7Z6yL4zQhZ3OPEVHB7fL6Ka6skscFHfmt2k=
+golang.org/x/net v0.0.0-20180801234040-f4c29de78a2a h1:8fCF9zjAir2SP3N+axz9xs+0r4V8dqPzqsWO10t8zoo=
+golang.org/x/net v0.0.0-20180801234040-f4c29de78a2a/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
+golang.org/x/sys v0.0.0-20180802203216-0ffbfd41fbef h1:ESfhYoBNk2UQGmavscFPKfwmc4ZTB2+UdQYsVw6Bq9M=
+golang.org/x/sys v0.0.0-20180802203216-0ffbfd41fbef/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=