docker issue rails asset precompile boot2docker

Question

我正在尝试在我的容器上运行资产编译（在boot2docker上运行）。

我目前有一个pg数据库和Web应用程序容器的docker镜像。我不知道为什么预编译资产在成功构建后没有显示。

我的Dockerfile如下所示：

FROM ruby:2.2.0

RUN apt-get update -qq && apt-get install -y build-essential

# Postgres support
RUN apt-get install -y libpq-dev

# Nokogiri support
RUN apt-get install -y libxml2-dev libxslt1-dev

# JS runtime
RUN apt-get install -y nodejs

ENV APP_HOME /app

RUN mkdir $APP_HOME
RUN mkdir $APP_HOME/tmp
RUN mkdir $APP_HOME/log

# Copy the Gemfile and Gemfile.lock into the image.
# Temporarily set the working directory to where they are.
WORKDIR /tmp
ADD Gemfile Gemfile
ADD Gemfile.lock Gemfile.lock

# Install ruby dependencies
RUN bundle install

# Add app to container
ADD . $APP_HOME

# Add container working directory
WORKDIR $APP_HOME

# Expose puma port
EXPOSE 3000

# Expose the assets directory
VOLUME /app/public

# Precompile js/scss assets
RUN bundle exec rake assets:precompile

# Run puma server
CMD bundle exec puma -C /app/puma.rb

搬运工-compose.yml

db:
  image: postgres
web:
  build: .
  volumes:
    - .:/app
    - /mnt/docker/app/public:/app/public
  links:
    - db
  environment:
    VIRTUAL_HOST: app.dev

当我检查/mnt/docker/app/public时，没有任何内容：（。