title: ESLint only target a specific directory (eslintrc, create-react-app)
body: <p>I have a folder structure similar to this:</p>
  
  <pre><code>/root
   .eslintrc.json
   package.json
   /someFolder
     /sub
     /sub
   /anotherFolder
   /src
     /containers
     /components
   /oneMoreFolder
     /sub
     /sub
  </code></pre>
  
  <p>I'm working with create-react-app and am applying airbnb rules. I have been able to run the linter in a specific folder easily from the CLI but on compile, it targets ALL folders.</p>
  
  <p>I want to run the linter on compile on just the files within the <strong>/src</strong> folder.</p>
  
  <p>How can I go about this? I've tried a number of solutions.</p>
  
  <p>Thank you!</p>
  
  <p><em>TL:DR How do I target just one subfolder and all of its files on compile when using eslint and create-react-app?</em></p>