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admissioncontrollers/introduction/sourcecode/dockerfile

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+FROM golang:1.15-alpine as dev-env
+
+WORKDIR /app
+
+FROM dev-env as build-env
+COPY go.mod /go.sum /app/
+RUN go mod download
+
+COPY . /app/
+
+RUN CGO_ENABLED=0 go build -o /webhook
+
+FROM alpine:3.10 as runtime
+
+COPY --from=build-env /webhook /usr/local/bin/webhook
+RUN chmod +x /usr/local/bin/webhook
+
+ENTRYPOINT ["webhook"]