# --- build stage ------------------------------------------------------------
FROM golang:1.22-alpine AS build
WORKDIR /src

# Cache dependencies first.
COPY go.mod go.sum ./
RUN go mod download

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

# --- runtime stage ----------------------------------------------------------
FROM alpine:3.20
RUN apk add --no-cache ca-certificates && adduser -D -u 10001 app
USER app
WORKDIR /app
COPY --from=build /out/server /app/server

ENV PORT=8080
EXPOSE 8080
ENTRYPOINT ["/app/server"]