Add ca certificates to docker image

Dockerfile

@@ -1,11 +1,8 @@
-FROM golang:1.14 AS builder
-
-RUN mkdir -p github.com/yannh/kubeconform
-COPY . github.com/yannh/kubeconform/
-WORKDIR github.com/yannh/kubeconform
-RUN make build-static
+FROM alpine:latest as certs
+RUN apk add ca-certificates
 
 FROM scratch AS kubeconform
 MAINTAINER Yann HAMON <[email protected]>
-COPY --from=builder /go/github.com/yannh/kubeconform/bin/kubeconform /
+COPY --from=certs /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt
+COPY bin/kubeconform /
 ENTRYPOINT ["/kubeconform"]

Makefile

@@ -1,6 +1,6 @@
 #!/usr/bin/make -f
 
-.PHONY: test-build test build build-static docker-test docker-build-static build-bats docker-acceptance
+.PHONY: test-build test build build-static docker-test docker-build-static build-bats docker-acceptance docker-image
 
 test-build: test build
 
@@ -10,6 +10,9 @@ test:
 build:
 	go build -o bin/kubeconform
 
+docker-image:
+	docker build -t kubeconform .
+
 build-static:
 	CGO_ENABLED=0 GOOS=linux GOARCH=amd64 GO111MODULE=on go build -a -o bin/kubeconform