# syntax=docker/dockerfile:1
FROM golang:1.23-alpine AS build
WORKDIR /src
COPY go.mod go.sum* ./
RUN go mod download
COPY *.go ./
RUN CGO_ENABLED=0 GOOS=linux go build -trimpath -ldflags="-s -w" -o /heatmap .

FROM scratch
COPY --from=build /heatmap /heatmap
COPY --from=build /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
EXPOSE 8080
USER 65532:65532
ENTRYPOINT ["/heatmap"]