title: Next.js 12 ( with react ): Cannot read env variables, process.env is undefined
body: <p>I'm using next.js 12 with a react app.</p>
  <p>I have the following .env.local file:</p>
  <p><code>NEXT_PUBLIC_DEVELOPMENT_ENV_VARIABLE=&quot;public_development_variable&quot;</code></p>
  <p>I start the dev server and in the browser i do:
  <code>console.log('###ENV', process.env)</code>
  and i always get undefined.</p>
  <p>In the logs i have this that confirms that the env file was readed:
  <code>info  - Loaded env from /Users/testdash/.env.local</code></p>
  <p>But process.env is always empty</p>