Add support for configuring the IP address that is advertised to the API server.

This is needed when running in fargate as ip.address() will return the wrong ip address.

lib/utils/install-srf-locals.js

@@ -12,6 +12,7 @@ const {
   JAMBONES_TIME_SERIES_HOST,
   JAMBONES_ESL_LISTEN_ADDRESS,
   PORT,
+  HTTP_IP,
   NODE_ENV,
 } = require('../config');
 const Registrar = require('@jambonz/mw-registrar');
@@ -193,7 +194,8 @@ function installSrfLocals(srf, logger) {
 
   let localIp;
   try {
-    localIp = ip.address();
+    // Either use the configured IP address or call ip.address() to find it
+    localIp = HTTP_IP || ip.address();
   } catch (err) {
     logger.error({err}, 'installSrfLocals - error detecting local ipv4 address');
   }