Added listener for sigint and sigterm.

index.js

@@ -16,7 +16,7 @@ try {
   config = require("./config.json");
 } catch(err) {
   console.error("Couldn't load config, using defaults.");
-  console.error(JSON.stringify(config), ' ', 4);
+  console.error(JSON.stringify(config, ' ', 4));
 }
 
 app.use(require('compression')());
@@ -75,3 +75,6 @@ var server = app.listen(config.port, function () {
     var port = server.address().port;
     console.log('Server listening at http://%s:%s', host, port);
 });
+
+process.on("SIGINT", () => process.exit(0));
+process.on("SIGTERM", () => process.exit(0));