fixed bitcoin URL

rpc/server.js

@@ -7,7 +7,8 @@ const request = require("request");
 //var electrsHost = 'electrs';
 const btcCookiePass = process.env.BTC_RPC_COOKIE_PASS;
 const btcRpcPort = process.env.BTC_RPC_PORT;
-const btcRpcUrl = `127.0.0.1:${btcRpcPort}/`;
+const btcIp = process.env.BITCOIN_IP;
+const btcRpcUrl = `${btcIp}:${btcRpcPort}/`;
 const electrsHost = process.env.ELECTRS_HOST;
 const electrsPort = process.env.ELECTRS_PORT;
 const btcRpcUser = process.env.BITCOIN_RPC_USER;