How to use @opencensus/exporter-instana - 1 common examples

* you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

const tracing = require('@opencensus/nodejs');
const instana = require('@opencensus/exporter-instana');

const exporter = new instana.InstanaTraceExporter();

tracing.start({exporter});

// example application
const http = require('http');
http.createServer((req, res) => {
  res.writeHead(200, { 'Content-Type': 'text/html' });
  res.write('Hello World!');
  res.end();
}).listen(8080);