use_node doesn't work at all #319 https://github.com/direnv/direnv/issues/319

Dockerfile

FROM ubuntu:16.04

RUN apt-get update \
  && apt-get install -y git curl

# RUN apt-get install -y curl
RUN curl -o - https://raw.githubusercontent.com/creationix/nvm/v0.33.8/install.sh | bash

RUN curl -L -o direnv https://github.com/direnv/direnv/releases/download/v2.14.0/direnv.linux-amd64
RUN install direnv /usr/local/bin/
RUN echo 'eval "$(direnv hook bash)"' >> ~/.bashrc

RUN . ~/.bashrc && nvm install 8.9.1

SHELL ["/bin/bash", "-l", "-c"]

RUN mkdir -p /app \
  && echo -e '\
set -x\n\
export NODE_VERSIONS=$HOME/.nvm/versions/node/ \n\
export NODE_VERSION_PREFIX=v \n\
use node 8.9.1 \n\
set +x\n' > /app/.envrc

RUN cd /app || true \
  && direnv allow

CMD cd /app && direnv reload \
  && echo "================================================================" \
  && echo "bash version: $(bash --version)" \
  && echo "================================================================" \
  && echo "node version: $(node --version)" \
  && set \
  && echo "================================================================"