code: function (target, mount, component) {
      var file = fs.readFileSync(target, 'utf-8');
      var $ = cheerio.load(file);
      //- returns true if any of the elements match mount, so throw if false
      if (!$(mount).is(mount)) { throw messages.errors.domNodeNotFound(mount); }
      //- write to html
      $(mount).append(component);
      fs.writeFileSync(target, $.html());
    }
docs: Insert the string into the target html file at the mount point
  @param {string} target - path to html file
  @param {string} mount - query for a dom node that the component will be injected into
  @param {string} component - string representation of a react component