Dockerfile-cli

# Build image
FROM --platform=$BUILDPLATFORM golang:1.17 as build
ARG BUILDPLATFORM
ARG TARGETPLATFORM
# https://github.com/docker/buildx/issues/510#issuecomment-768432329
ENV BUILDPLATFORM=${BUILDPLATFORM:-linux/amd64}
ENV TARGETPLATFORM=${TARGETPLATFORM:-linux/amd64}

WORKDIR /go/src

# This should create cached layer of our dependencies for subsequent builds to use
COPY go.mod /go/src
COPY go.sum /go/src
RUN go mod download

# Copy the local package files to the container
ADD . /go/src

ARG VERSION

# Build the server inside the container
RUN CGO_ENABLED=0 GOOS=${TARGETPLATFORM%/*} GOARCH=${TARGETPLATFORM#*/} go build -a -installsuffix cgo \
    -ldflags "-w -s -X main.Version=$VERSION" -o /gubernator-cli /go/src/cmd/gubernator-cli/main.go

# Create our deploy image
FROM scratch

# Certs for ssl
COPY --from=build /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/

# Copy our static executable.
COPY --from=build /gubernator-cli /gubernator-cli

# Run the server
ENTRYPOINT ["/gubernator-cli"]