title: Where does the output for "docker -build" go?
body: <p>I'm trying to build a sample docker image.  When I run the following command:</p>
  
  <pre><code>docker build -t sample .
  </code></pre>
  
  <p>Where does the docker image go?</p>
  
  <p>Here is my <code>Dockerfile</code>:</p>
  
  <pre><code>FROM node:boron
  
  # Create app directory
  RUN mkdir -p /usr/src/app
  WORKDIR /usr/src/app
  
  # Install app dependencies
  COPY package.json /usr/src/app/
  RUN npm install
  
  # Bundle app source
  COPY . /usr/src/app
  
  EXPOSE 8080
  CMD [ "npm", "start" ]
  </code></pre>