Update base image + Go + deps

Author: george-angel

Dockerfile

@@ -1,15 +1,13 @@
-FROM alpine:3.7
-
-ENV GOPATH=/go
-
+FROM golang:1.14-alpine AS build
 WORKDIR /go/src/github.com/utilitywarehouse/gcp-disk-snapshotter
 COPY . /go/src/github.com/utilitywarehouse/gcp-disk-snapshotter
-
-RUN \
- apk --no-cache add ca-certificates git go musl-dev && \
- go get -t ./... && \
- go test ./... && \
- CGO_ENABLED=0 go build -ldflags '-s -extldflags "-static"' -o /gcp-disk-snapshotter . && \
- apk del go musl-dev && rm -r /go
-
+ENV CGO_ENABLED 0
+RUN apk --no-cache add git &&\
+  go get -t ./... &&\
+  go test ./... &&\
+  go build -o /gcp-disk-snapshotter .
+
+FROM alpine:3.12
+RUN apk --no-cache add ca-certificates
+COPY --from=build /gcp-disk-snapshotter /gcp-disk-snapshotter
 ENTRYPOINT [ "/gcp-disk-snapshotter" ]

go.mod

@@ -0,0 +1,17 @@
+module github.com/utilitywarehouse/gcp-disk-snapshotter
+
+go 1.14
+
+require (
+	cloud.google.com/go v0.61.0 // indirect
+	github.com/golang/mock v1.4.3
+	github.com/pkg/errors v0.9.1
+	github.com/prometheus/client_golang v1.7.1
+	github.com/sirupsen/logrus v1.6.0
+	github.com/stretchr/testify v1.6.1
+	github.com/utilitywarehouse/go-operational v0.0.0-20190722153447-b0f3f6284543
+	golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d
+	golang.org/x/sys v0.0.0-20200722175500-76b94024e4b6 // indirect
+	google.golang.org/api v0.29.0
+	google.golang.org/genproto v0.0.0-20200724131911-43cab4749ae7 // indirect
+)