title: tsc with tsconfig does nothing. What am I doing wrong?
body: <p>My directory has 2 files:  a <code>tsconfig.json</code> with simply <code>{}</code> and a hello.ts with a line that says <code>console.log('help!!');</code>.</p>
  
  <p>When I run <code>tsc hello</code> I get the additional <code>hello.js</code> as expected.</p>
  
  <p>If I delete <code>hello.js</code> and run <code>tsc</code> intending to pick up my configuration I get nothing. No error message, no <code>hello.js</code>.  I'm sure I'm missing something easy!</p>
  
  <p>NOTE: My hypersimple tsconfig is just for purposes of this discussion. I have tried several options including the simple one created with <code>tsc --init</code>. I don't want to include <code>files</code> specifically but have <code>tsc</code> pick up all the files in my folder <a href="https://www.typescriptlang.org/docs/handbook/tsconfig-json.html" rel="noreferrer">as documented</a>.</p>