FROM golang:1.22 AS compile

WORKDIR /usr/src/app

# pre-copy/cache go.mod for pre-downloading dependencies and only redownloading them in subsequent builds if they change
# COPY go.mod go.sum ./
# RUN go mod download && go mod verify

COPY . .
RUN CGO_ENABLED=0 GOOS=linux go build -ldflags="-s -w" -o /app ./...

FROM alpine:latest AS compressor
RUN apk add --no-cache upx
COPY --from=compile /app /app
RUN upx --best /app

FROM scratch AS service

WORKDIR /
COPY --from=compressor /app .

ENTRYPOINT ["/app"]