title: Using environment variables in Tomcat/Catalina Context docBase configuration
body: <p>I'm not a big tomcat user, but our project is using it currently.  We've committed a .xml configuration file that is placed in CATALINA_HOME\localhost, but get's updated rather often.  I would much prefer to symlink this file into that CATALINA_HOME\localhost directory from our working directory.  Unfortunately, the docBase path has to be modified per developer.</p>
  
  <p>Is there a way to use environment variables in the docBase path so that developers can keep their projects where they please and our startup scripts can symlink the catalina xml configuration? </p>
  
  <p>I would like something like this:</p>
  
  <p></p>
  
  <p>....</p>
  
  <p>