title: How do I build a dockerfile if the name of the dockerfile isn't Dockerfile?
body: <p>I am able a build a Dockerfile like</p>
  
  <p><code>docker build -t deepak/ruby .</code></p>
  
  <p>But for a Dockerfile which is not named <code>Dockerfile</code></p>
  
  <pre><code># DOCKER-VERSION 0.4.8
  
  FROM deepak/ruby
  
  MAINTAINER Deepak Kannan "deepak@example.com"
  
  RUN ./bin/rails s
  </code></pre>
  
  <p>let us say it is called <code>Dockerfile.app</code>
  which we build with</p>
  
  <p><code>docker build -t deepak/app Dockerfile.app</code></p>
  
  <p>then i get the error</p>
  
  <pre><code>Uploading context 0 bytes
  Error build: EOF
  EOF
  </code></pre>