Track unmanaged file descriptors

Closes: #166
PR-URL: #171

Author: tshemsedinov

server.js

@@ -8,14 +8,16 @@ const Config = require('./lib/config.js');
 const PATH = process.cwd();
 const CFG_PATH = path.join(PATH, 'config');
 
+const options = { trackUnmanagedFds: true };
+
 (async () => {
   const config = await new Config(CFG_PATH);
   const { sections } = config;
   const count = sections.server.ports.length;
   const workers = new Array(count);
 
   const start = id => {
-    const worker = new Worker('./lib/worker.js');
+    const worker = new Worker('./lib/worker.js', options);
     workers[id] = worker;
     worker.on('exit', code => {
       if (code !== 0) start(id);