feat: changing docker file

Signed-off-by: gkarthiks <github.gkarthiks@gmail.com>

Dockerfile

@@ -1,27 +1,22 @@
 # Stage 1: Build executable
-FROM golang:1.12-alpine as builder
+FROM golang:1.14-alpine as builder
 
 LABEL maintainer="Karthikeyan Govindaraj <github.gkarthiks@gmail.com>"
 
 WORKDIR /go/src/github.com/gkarthiks/container-resource-exporter
 COPY container_resource_exporter.go .
 
+COPY go.mod .
+COPY go.sum .
+
 RUN apk update && apk add git ca-certificates && rm -rf /var/cache/apk/*
 
-#RUN go get -v -t  .
-RUN set -x && \
-    go get github.com/sirupsen/logrus && \  
-    go get github.com/prometheus/client_golang/prometheus && \
-    go get k8s.io/api/core/v1 && \
-    go get k8s.io/apimachinery/pkg/apis/meta/v1 && \
-    go get k8s.io/client-go/kubernetes && \
-    go get k8s.io/metrics/pkg/apis/metrics/v1beta1 && \
-    go get k8s.io/metrics/pkg/client/clientset/versioned
+RUN go get -v -t  .
 
 RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build  -o /cr-exporter
 
 FROM scratch
 COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt
 COPY --from=builder /cr-exporter .
 EXPOSE 9000
-ENTRYPOINT [ "/cr-exporter" ]
+ENTRYPOINT [ "/cr-exporter" ]