title: react-scripts-ts looks for dependencies in all folders and throws error on build
body: <p>I build fullstack application using Node.js + Typescript and  React+ Typescript. 
  Folder structure:</p>
  
  <pre><code>App
     -node_modules             //server part's dependencies
     -build                    //includes compiled server code
     -src
         -server
         -client
                -node_modules  //client part's dependencies
                tsconfig.json  //created by 'create-react-app'
                package.json   //created by 'create-react-app'
  tsconfig.json
  tslint.json
  package.json                 // includes config for server compiling and running
  </code></pre>
  
  <p>So, when I execute command <code>tsc &amp;&amp; node build/www</code> server starts.</p>
  
  <p>But if I want to build react bundle with command <code>react-scripts-ts start</code>, I get errors that do not belong to the react project. For example:</p>
  
  <pre><code>Failed to compile.
  ~/projects/App/node_modules/@types/graphql/execution/execute.d.ts
  (1,44): Cannot find module '../error'.
  </code></pre>
  
  <p><strong>Why does  react-scripts-ts look for dependencies in non-react folder?</strong></p>