title: "EACCES: permission denied" when using "firebase serve"
body: <p>I am using "firebase serve" to test my Firebase web app locally. I ran into this error every time:</p>
  
  <blockquote>
    <p>Error: EACCES: permission denied, open
    '/Users/[my_user_name]/.config/configstore/@google-cloud/functions-emulator/.functions.json'
    You don't have access to this file.</p>
    
    <p>Error: EACCES: permission denied, open
    '/usr/local/lib/node_modules/firebase-tools/node_modules/@google-cloud/functions-emulator/logs/cloud-functions-emulator.log'</p>
  </blockquote>
  
  <p>It does work with a sudo. But I don't want to type in my sudo password every time. Every other command works fine without sudo except for this one.</p>