nu 0.41.0

A new type of shell
FROM ubuntu:18.04

# docker build -f docker/Dockerfile.nu-base -t nushell/nu-base .
# docker run -it nushell/nu-base

ENV DEBIAN_FRONTEND noninteractive
RUN apt-get update && apt-get install -y libssl-dev \
    libxcb-composite0-dev \
    pkg-config \
    libx11-dev \
    curl

ARG RELEASE=false
WORKDIR /code
RUN curl https://sh.rustup.rs -sSf | sh -s -- -y --no-modify-path --default-toolchain "stable"
ENV PATH=/root/.cargo/bin:$PATH
RUN rustup update
COPY . /code
RUN echo "##vso[task.prependpath]/root/.cargo/bin" && \
    rustc -Vv && \
    if $RELEASE; then cargo build --release; \
                   cp target/release/nu /usr/local/bin; \
                 else cargo build; \
                   cp target/debug/nu /usr/local/bin; fi;
ENTRYPOINT ["nu"]
CMD ["-l", "info"]