FROM golang:1.24-alpine AS builder
WORKDIR /app
COPY go.mod go.sum ./
RUN go mod download
COPY *.go ./
RUN CGO_ENABLED=0 go build -o energy-mqtt-sub .

FROM alpine:3.21
RUN apk add --no-cache ca-certificates tzdata
WORKDIR /app
COPY --from=builder /app/energy-mqtt-sub .
USER nobody:nobody
ENTRYPOINT ["./energy-mqtt-sub", "-c", "/srv/energy/meter/config.json"]