FROM golang:1.16-alpine AS build
RUN apk add --no-cache git
WORKDIR /build
RUN git clone https://code.rocketnine.space/tslocum/twins.git

WORKDIR /build/twins
RUN go build

FROM gruebel/upx as upx
COPY --from=build /build/twins/twins /twins-uncompressed
RUN upx --best --lzma -o /twins /twins-uncompressed

FROM alpine:3.13
WORKDIR /app
COPY --from=upx /twins /app/twins

EXPOSE 1965
CMD ["/app/twins", "-config", "/app/config.yaml"]