server.listen bind to ipv6 too

server/server.js

@@ -41,7 +41,8 @@ const args = require("args-parser")(process.argv);
 
 const version = require("../package.json").version;
 
-// If host is omitted, the server will accept connections on the unspecified IPv6 address (::) when IPv6 is available, or the unspecified IPv4 address (0.0.0.0) otherwise.
+// If host is omitted, the server will accept connections on the unspecified IPv6 address (::) when IPv6 is available and the unspecified IPv4 address (0.0.0.0) otherwise.
+// Dual-stack support for (::)
 const hostname = process.env.HOST || args.host;
 
 const port = parseInt(process.env.PORT || args.port || 3001);