title: Environment variable with dotenv and TypeScript
body: <p>I create this <code>.env</code> file:</p>
  
  <pre><code>TYPE=xxx
  HOST=xxx,
  PORT=xxx,
  USERNAME=xxx,
  PASSWORD=xxx,
  DATABASE=xxx,
  </code></pre>
  
  <p>in my file I use in this way:</p>
  
  <pre><code>import * as dotenv from "dotenv";
  
  dotenv.config();
  
  export const typeOrmConfig: TypeOrmModuleOptions = {
      port: process.env.PORT
  }
  </code></pre>
  
  <p>but i can use only my <code>port</code> variable from <code>.env</code> file and i cannot use rest of the variables,
  can someone tell me why i can't use rest of my vars?</p>