FROM alpine as builder

RUN apk add --no-cache \
        build-base \
        unzip \
        zlib-dev \
        zlib-static

COPY unxwb.zip /

RUN mkdir unxwb \
    && cd unxwb \
    && unzip ../unxwb.zip \
    && gcc -I. -o unxwb -O3 -static unxwb.c -lz

FROM alpine

RUN apk add --no-cache tini

COPY --from=builder /unxwb/unxwb /usr/local/bin/

ENTRYPOINT ["tini", "--", "unxwb"]