title: provide external config files in scala application
body: <p>In IntelliJ, I exported a scala/akka project using "dist". 
  That ends in a zip file, under </p>
  
  <pre><code>foo\target\universal\foo-1.0.0.zip
  </code></pre>
  
  <p>When I unzip the file, I get following directory structure:</p>
  
  <pre><code>D:.
  ├───bin
  │       foo
  │       foo.bat
  │
  └───lib
          a.jar
          b.jar
          com.foo.jar
          ...
          x.jar
  </code></pre>
  
  <p>In command line, I'm trying to run the <code>foo.bat</code>, but I'd like to provide external config files.</p>
  
  <p>I'd like to use e.g. <code>application.conf.prod</code> and <code>logback.xml.prod</code>, to override the <code>application.conf</code> and <code>logback.xml</code> files in the <code>com.foo.jar</code> file</p>
  
  <p>I'm using the following versions (copying part of <code>build.sbt</code>):</p>
  
  <pre><code>version := "1.0.0"
  scalaVersion := "2.11.8"
  
  "com.typesafe.akka" %% "akka-actor" % "2.4.9"
  "com.typesafe.akka" %% "akka-slf4j" % "2.4.9"
  "ch.qos.logback" % "logback-classic" % "1.1.6"
  "org.apache.kafka" % "kafka-clients" % "0.10.0.0"
  </code></pre>
  
  <p>Is there a way to do it?</p>
  
  <p>Thanks</p>