added devcontainer.

fix build error, deploy using docker-compose works,
misc changes
using global MQTT instead of local one to tap to already existin broker

server.js

@@ -98,6 +98,7 @@ app.get('/accontrol',
 
 //app.listen(81);
 
+try{
 var fs = require("fs");
 var https = require('https');
 var privateKey  = fs.readFileSync('/etc/letsencrypt/live/iot.d-popov.com/privkey.pem', 'utf8');
@@ -108,3 +109,6 @@ var httpsServer = https.createServer(credentials, app);
 httpsServer.listen(8443, () => {
   console.log('HTTP server listening on port 8443');
 });
+}catch(e){
+  console.log("failed to start HTTPS: " + e.toString())
+}