How can I ensure that appsettings.dev.json gets copied to the output folder?
<p>I have three configuration files, one for each environment:</p>

<ol>
<li>appsettings.json -> production </li>
<li>appsettings.dev.json -> development</li>
<li>appsettings.stg.json -> staging</li>
</ol>

<p>If I set <em>ASPNETCORE_ENVIRONMENT</em> to <em>dev</em>, I get a runtime exception complaining about not being able to find appsettings.dev.json. I tried adding </p>

<pre><code>"copyToOutput": [
  "appsettings.dev.json"
]
</code></pre>

<p>to the <code>buildOptions</code> section in project.json but it doesn't seem to have any effect. </p>

<p>Is there another way I can force appsettings.dev.json to be copied to the output directory?</p>