listen in sigint in docker

src/backend/FrontblockAdmin.ts

@@ -1,13 +1,12 @@
 'use strict'
 
 import * as Logger from 'log4js'
-import { Plugin, socketioRPC, ConfigLoader } from 'frontblock-generic/Plugin';
+import { socketioRPC, ConfigLoader } from 'frontblock-generic/Plugin';
 import { ErrorResponse, SuccessResponse } from 'frontblock-generic/Types';
 import { default as PluginManagerPlugin } from './PluginManager/Plugin'
 import express = require('express');
 import http = require('http');
 import bsock = require('bsock');
-import { type } from 'os';
 
 const kfs = require("key-file-storage").default('kfs')
 
@@ -186,7 +185,7 @@ export class FrontblockAdmin extends ConfigLoader<AdminConf>{
         this.express.use('/', express.static('static'))
 
         /**
-         * get the compiled FrontendPlugins
+         * get the compiled FrontendPlugins.js
          */
         this.express.get('/plugins/:id'+".js", (request, response) => {
             let frontend = this.pm.getFrontend(request.params.id)
@@ -302,3 +301,10 @@ export class FrontblockAdmin extends ConfigLoader<AdminConf>{
 }
 
 new FrontblockAdmin()
+
+
+process.on( 'SIGINT', function() {
+    logger.info( "Gracefully shutting down from SIGINT (Ctrl-C)" );
+    // some other closing procedures go here
+    process.exit( );
+  })