Feat/cli remove fs (#116)

* support draining feature server manually

* support draining feature server manually

* support CLI to add or remove feature server

* wip

* wip

* wip

* add redis key for feature server and integration test

* wip

app.js

@@ -17,6 +17,7 @@ const {
   NODE_ENV,
   SBC_PUBLIC_ADDRESS_KEEP_ALIVE_IN_MILISECOND
 } = require('./lib/config');
+
 assert.ok(JAMBONES_MYSQL_HOST &&
   JAMBONES_MYSQL_USER &&
   JAMBONES_MYSQL_PASSWORD &&
@@ -260,6 +261,9 @@ srf.use('options', [
 srf.register(require('./lib/register')({logger}));
 srf.options(require('./lib/options')({srf, logger}));
 
+// Start CLI runtime config server with access to srf.locals
+require('./lib/cli/runtime-config').initialize(srf.locals, logger);
+
 setInterval(async() => {
   const count = await srf.locals.registrar.getCountOfUsers();
   debug(`count of registered users: ${count}`);