Dockerfile multiple stage example

Dockerfile

FROM ubuntu:18.04 AS builder
WORKDIR /app/
RUN apt-get update
RUN apt-get install -y build-essential libpoppler-private-dev libleptonica-dev pkg-config git
RUN git clone https://github.com/allenai/pdffigures.git
WORKDIR pdffigures
RUN make DEBUG=0
RUN ldd ./pdffigures | tr -s '[:blank:]' '\n' | grep '^/' | xargs -I % sh -c 'mkdir -p $(dirname deps%); cp % deps%;'

FROM ubuntu:18.04
WORKDIR /usr/src/app

COPY --from=builder /app/pdffigures/deps /
COPY --from=builder /app/pdffigures/pdffigures .

CMD [ "echo", "hello world" ]