# Builder
FROM golang:alpine AS builder

WORKDIR /go/src/app

ARG MAIN_GO=pkg/main.go
# ARG HTTP_PORT=8080
# ENV HTTP_PORT {$HTTP_PORT}

COPY go.mod go.sum ./
COPY pkg ./pkg

RUN go mod download && \
    CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -ldflags="-w -s" -o /go/bin/app $MAIN_GO

# Destination image
FROM gcr.io/distroless/base-debian10

COPY --from=builder /go/bin/app /app

EXPOSE $HTTP_PORT
ENTRYPOINT ["/app"]