try 171222 v3

Author: tarentyeh

.vscode/launch.json

@@ -13,6 +13,7 @@
                 "CHANNEL_ACCESS_TOKEN": "CsR1tRMsaaMgQYEoi1J50Wi7W/EQyNUF8pZpdBlaIJu3PMEGCoiP62NAFcb4++fimhkXfWqAN2EV9mYy77No0JTSvTjS3Umyw8Z+4Bun85HWW8zfQ25YI93LKSHfWee0CE13U0nBh0Vv2sBNVKboDgdB04t89/1O/w1cDnyilFU=",
                 "CHANNEL_SECRET": "58a42475f74073df54edda24cde00f50",
                 "PORT": "8089",
+                "POSTGRES_HOST": "localhost",
             },
         }
     ]

poloniex.js

@@ -120,7 +120,7 @@ module.exports = {
       if (pair.indexOf('_' + currency) === -1) {
         continue;
       }
-      var price = currency.toUpperCase() + '->' + pair.replace(currency, '').toUpperCase() + ': ' + (Math.round(tickers[pair].last * 10000) / 10000);
+      var price = currency.toUpperCase() + '->' + pair.replace('_' + currency, '').toUpperCase() + ': ' + (Math.round(tickers[pair].last * 10000) / 10000);
       if (response == undefined) {
         if (withTimestamp == true) {
           response = tickers[pair].updatetime.toISOString() + '\n' + price;

postgres.js

@@ -4,13 +4,15 @@ const initOptions = {
 };
 const pgp = require('pg-promise')(initOptions);
 const config = {
-  host: 'postgres-db',
+  // In production environment, host name is postgres container name from docker run or yml file
+  // In developer environment, host name needs to defined in env variables or launch.json
+  host: process.env.POSTGRES_HOST || 'postgres-db',
   port: 5432,
   database: 'example_database',
   user: 'postgres',
   password: 'example'
 };
-const pgUri = 'postgres://postgres:example@postgres-db:5432/example_database';
+//const pgUri = 'postgres://postgres:example@postgres-db:5432/example_database';
 
 const db = pgp(config);