Dockerfile

FROM golang:1.18 as base

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

FROM base as build
COPY . .
# Build the manager binary
RUN GIT_VERSION=$(git describe --tags --dirty --always) && \
    GIT_COMMIT=$(git rev-parse HEAD) && \
    BUILD_DATE=$(date +%Y-%m-%dT%H:%M:%S%z) && \
    CGO_ENABLED=0 GOOS=linux GOARCH=amd64 GO111MODULE=on \
    go build -ldflags="-X main.GitVersion=${GIT_VERSION} -X main.GitCommit=${GIT_COMMIT} -X main.BuildDate=${BUILD_DATE}" \
    -a -o /out/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=build /out/manager .
USER nonroot:nonroot

ENTRYPOINT ["/manager"]