content: # Build the manager binary
  FROM golang:1.19 as builder
  ARG TARGETOS
  ARG TARGETARCH
  
  WORKDIR /workspace
  # Copy the Go Modules manifests
  COPY go.mod go.mod
  COPY go.sum go.sum
  # cache deps before building and copying source so that we don't need to re-download as much
  # and so that source changes don't invalidate our downloaded layer
  RUN go mod download
  
  # Copy the go source
  COPY cmd/controller-manager/main.go cmd/controller-manager/main.go
  COPY api/ api/
  COPY pkg/ pkg/
  
  # Build
  # the GOARCH has not a default value to allow the binary be built according to the host where the command
  # was called. For example, if we call make docker-build in a local env which has the Apple Silicon M1 SO
  # the docker BUILDPLATFORM arg will be linux/arm64 when for Apple x86 it will be linux/amd64. Therefore,
  # by leaving it empty we can ensure that the container and binary shipped on it will have the same platform.
  RUN CGO_ENABLED=0 GOOS=${TARGETOS:-linux} GOARCH=${TARGETARCH} go build -a -o manager cmd/controller-manager/main.go
  
  # Use distroless as minimal base image to package the manager binary
  # Refer to https://github.com/GoogleContainerTools/distroless for more details
  FROM gcr.io/distroless/static:nonroot
  WORKDIR /
  COPY --from=builder /workspace/manager .
  USER 65532:65532
  
  ENTRYPOINT ["/manager"]
  