title: How do I use dotEnv when there is no .env file?
body: <p>I have a project that locally has a <code>.env</code> file.  When I set up the environment variables on my local machine I use:</p>
  
  <pre><code>import dotEnv from "dotenv";
  dotEnv.config();
  </code></pre>
  
  <p>It find the <code>.env</code> and loads up all the variables.  When I push the project to Heroku, I don't push up the <code>.env</code> file.  I expected <code>dotEnv</code> to understand that, but I get this error:</p>
  
  <pre><code>{ Error: ENOENT: no such file or directory, open '.env'
  </code></pre>
  
  <p>How do I get around that I am not pushing up a <code>.env</code> file?  What is the proper way to use <code>.dotEnv</code>?</p>