FROM golang:alpine AS builder

WORKDIR /src

COPY go.mod go.sum ./
RUN go mod download

COPY . .
RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -trimpath -ldflags="-s -w" -o /out/pp .

FROM alpine

RUN apk add --no-cache tzdata ca-certificates

WORKDIR /app

COPY --from=builder /out/pp /usr/local/bin/pp

EXPOSE 80

HEALTHCHECK --start-period=5s --start-interval=1s CMD \
    test "$(wget -q -O - http://127.0.0.1/health)" = "ok"

ENTRYPOINT ["/usr/local/bin/pp"]