Initial version of cert-manager

    This is the initial contribution to the Open Source Gardener project.

    The following SAP developers contributed to this project until this
    initial contribution was published as open source:

    $ git shortlog -sn
        23  Martin Weindel

.gitignore

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+bin/
+.idea/
+*.sw[pq]
+tmp/
+/local/
+/cmd/cert-controller-manager/cert-controller-manager
+/cert-controller-manager
+.vscode/

CODEOWNERS

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+# cert-management maintainers
+*   @MartinWeindel
+*   @mandelsoft

CONTRIBUTING.md

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+Please refer to the [Gardener contributor guide](https://github.com/gardener/documentation/blob/master/CONTRIBUTING.md).

Dockerfile

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+FROM golang:1.12.7
+WORKDIR /go/src/github.com/gardener/cert-management/
+RUN go get -u github.com/golang/dep/cmd/dep
+COPY . .
+RUN dep ensure
+RUN CGO_ENABLED=0 GOOS=linux go build -a -o cert-controller-manager -ldflags "-X main.Version=$(cat VERSION)-$(git rev-parse HEAD)" ./cmd/cert-controller-manager
+
+FROM alpine:latest
+RUN apk --no-cache add ca-certificates tzdata
+WORKDIR /root/
+COPY --from=0 /go/src/github.com/gardener/cert-management/cert-controller-manager .
+ENTRYPOINT ["./cert-controller-manager"]